Engines · Nonroad diesel engines

Deutz nonroad diesel engines

EPA certification records list 962 nonroad diesel engine families from Deutz, model years 1996–2026. Rated power ranges from 14 to 345 kW (listed for 512 of 962 families), median 102 kW. Displacement spans 343 cc to 35.5 l. Turbo Air to Air (TAA) engines make up 33% of families. The most families were certified in 2009 (46).

Engine families962
Engine models196
Model years1996–2026
Power range14–345 kWmedian 102 kW
Displacement343 cc – 35.5 l
Rank in category#5of 75 makers by families

Power distribution

Number of engine families by rated power.

0–19 kW7
19–37 kW23
37–56 kW121
56–75 kW1
75–130 kW151
130–225 kW58
225–450 kW151

Families certified per year

19964
199711
199815
199918
200023
200130
200234
200330
200425
200525
200628
200736
200842
200946
201045
201140
201238
201333
201425
201528
201628
201729
201829
201930
202033
202139
202240
202340
202442
202538
202638

Emission standards by year

How Deutz's certifications moved through emission standards.

YearStandards certified (families)
2012Interim Tier 4 (30) · Tier 3 (8)
2013Interim Tier 4 (22) · Tier 3 (8) · Tier 4 (Final or Phase In) (3)
2014Interim Tier 4 (11) · Tier 3 (8) · Tier 4 (Final or Phase In) (6)
2015Tier 4 (Final or Phase In) (20) · Tier 3 (8)
2016Tier 4 (Final or Phase In) (20) · Tier 3 (8)
2017Tier 4 (Final or Phase In) (21) · Tier 3 (8)
2018Tier 4 (Final or Phase In) (21) · Tier 3 (8)
2019Tier 4 (Final or Phase In) (22) · Tier 3 (8)
2020Tier 4 (Final or Phase In) (24) · Tier 3 (9)
2021Tier 4 (Final or Phase In) (30) · Tier 3 (8) · Interim Tier 4 (1)
2022Tier 4 (Final or Phase In) (31) · Tier 3 (8) · Interim Tier 4 (1)
2023Tier 4 (Final or Phase In) (31) · Tier 3 (8) · Interim Tier 4 (1)
2024Tier 4 (Final or Phase In) (31) · Tier 3 (10) · Interim Tier 4 (1)
2025Tier 4 (Final or Phase In) (31) · Tier 3 (6) · Interim Tier 4 (1)
2026Tier 4 (Final or Phase In) (31) · Tier 3 (6) · Interim Tier 4 (1)

Technical mix

Fuel
Diesel4387-15 ppm Ultra Low Sulfur Diesel380300-500 ppm Low Sulfur Diesel132
Aspiration
Turbo Air to Air (TAA)144Naturally aspirated136Turbocharged97Single Stage Turbo54Turbo Air to Water (TAW)5Supercharged2
Configuration
4 Stroke Compression Ignition512

Most certified engine models

Ag30C5Ei55E28D3Uc10028D3Cc20228D3Uc15127C4Di55C25Cfvi129A24D3Cc25015C4Di36,414Cfvi21013C4Di55F13D3Cc25113

Engine families — latest 150

FamilyModelYearDisplacementPowerFuelStandard
TDZXL02.2110Cfdi55B20262.2 l46 kW7-15 ppm Ultra Low Sulfur DieselTier 4 (Final or Phase In)
TDZXL02.2111Cfdi44B20262.2 l46 kW7-15 ppm Ultra Low Sulfur DieselTier 4 (Final or Phase In)
TDZXL02.2112C5Oi18B20262.2 l14 kW7-15 ppm Ultra Low Sulfur DieselTier 4 (Final or Phase In)
TDZXL02.2114C5Ei55E20262.2 l46 kW7-15 ppm Ultra Low Sulfur DieselTier 4 (Final or Phase In)
TDZXL02.2115C5Ei44E20262.2 l46 kW7-15 ppm Ultra Low Sulfur DieselTier 4 (Final or Phase In)
TDZXL02.9016C4Di55C20262.9 l46 kW7-15 ppm Ultra Low Sulfur DieselTier 4 (Final or Phase In)
TDZXL02.9020C4Di55C20262.9 l46 kW7-15 ppm Ultra Low Sulfur DieselTier 4 (Final or Phase In)
TDZXL02.9021C4Di36,420262.9 l28 kW7-15 ppm Ultra Low Sulfur DieselTier 4 (Final or Phase In)
TDZXL02.9118C5Ei55E20262.9 l46 kW7-15 ppm Ultra Low Sulfur DieselTier 4 (Final or Phase In)
TDZXL02.9119C5Ei55E20262.9 l46 kW7-15 ppm Ultra Low Sulfur DieselTier 4 (Final or Phase In)
TDZXL02.9120C5Vt75E20262.9 l93 kW7-15 ppm Ultra Low Sulfur DieselTier 4 (Final or Phase In)
TDZXL03.1041C3Oi23,520261.6 l28 kW300-500 ppm Low Sulfur DieselInterim Tier 4
TDZXL03.6018C4Di55F20263.6 l46 kW7-15 ppm Ultra Low Sulfur DieselTier 4 (Final or Phase In)
TDZXL03.6060Cfxi100D20263.6 l93 kW7-15 ppm Ultra Low Sulfur DieselTier 4 (Final or Phase In)
TDZXL03.6063C4Di5520263.6 l46 kW7-15 ppm Ultra Low Sulfur DieselTier 4 (Final or Phase In)
TDZXL03.6121C5Ei55E20263.6 l46 kW7-15 ppm Ultra Low Sulfur DieselTier 4 (Final or Phase In)
TDZXL03.6122C5Ei55E20263.6 l46 kW7-15 ppm Ultra Low Sulfur DieselTier 4 (Final or Phase In)
TDZXL03.6123C5Vi105Gu20263.6 l93 kW7-15 ppm Ultra Low Sulfur DieselTier 4 (Final or Phase In)
TDZXL04.1054Cfvi11520264.0 l102 kW7-15 ppm Ultra Low Sulfur DieselTier 4 (Final or Phase In)
TDZXL04.1056Cfvt120U20264.0 l102 kW7-15 ppm Ultra Low Sulfur DieselTier 4 (Final or Phase In)
TDZXL04.1125C3Ui8920264.0 l102 kW7-15 ppm Ultra Low Sulfur DieselTier 3
TDZXL04.8029D3Uc10020264.8 l102 kW300-500 ppm Low Sulfur DieselTier 3
TDZXL05.2124C5Ni170Km20265.2 l345 kW7-15 ppm Ultra Low Sulfur DieselTier 4 (Final or Phase In)
TDZXL05.7052Cfvi120B20265.7 l345 kW7-15 ppm Ultra Low Sulfur DieselTier 4 (Final or Phase In)
TDZXL05.7053Cfvi129A20265.7 l102 kW7-15 ppm Ultra Low Sulfur DieselTier 4 (Final or Phase In)
TDZXL06.1048Cfwt211U20266.1 l345 kW7-15 ppm Ultra Low Sulfur DieselTier 4 (Final or Phase In)
TDZXL06.1049Cfwt174U20266.1 l345 kW7-15 ppm Ultra Low Sulfur DieselTier 4 (Final or Phase In)
TDZXL06.1050Cfvi180C20266.1 l345 kW7-15 ppm Ultra Low Sulfur DieselTier 4 (Final or Phase In)
TDZXL06.1059Cfvi129A20266.1 l102 kW7-15 ppm Ultra Low Sulfur DieselTier 4 (Final or Phase In)
TDZXL06.1061Cfwt120U20266.1 l102 kW7-15 ppm Ultra Low Sulfur DieselTier 4 (Final or Phase In)
TDZXL07.1030D3Uc15120267.1 l178 kW300-500 ppm Low Sulfur DieselTier 3
TDZXL07.1031D3Cc20220267.1 l178 kW300-500 ppm Low Sulfur DieselTier 3
TDZXL07.1032D3Cc25020267.1 l338 kW300-500 ppm Low Sulfur DieselTier 3
TDZXL07.1126C3Ui18020267.1 l178 kW7-15 ppm Ultra Low Sulfur DieselTier 3
TDZXL07.8046Cfvi21020267.8 l345 kW7-15 ppm Ultra Low Sulfur DieselTier 4 (Final or Phase In)
TDZXL07.8047Cfwt291U20267.8 l345 kW7-15 ppm Ultra Low Sulfur DieselTier 4 (Final or Phase In)
TDZXL07.8051Cfvi250A20267.8 l345 kW7-15 ppm Ultra Low Sulfur DieselTier 4 (Final or Phase In)
TDZXL15.9058Cfyi520U202615.9 l345 kW7-15 ppm Ultra Low Sulfur DieselTier 4 (Final or Phase In)
SDZXL02.2110Cfdi55B20252.2 l46 kW7-15 ppm Ultra Low Sulfur DieselTier 4 (Final or Phase In)
SDZXL02.2111Cfdi44B20252.2 l46 kW7-15 ppm Ultra Low Sulfur DieselTier 4 (Final or Phase In)
SDZXL02.2112C5Oi18B20252.2 l14 kW7-15 ppm Ultra Low Sulfur DieselTier 4 (Final or Phase In)
SDZXL02.2114C5Ei55E20252.2 l46 kW7-15 ppm Ultra Low Sulfur DieselTier 4 (Final or Phase In)
SDZXL02.2115C5Ei44E20252.2 l46 kW7-15 ppm Ultra Low Sulfur DieselTier 4 (Final or Phase In)
SDZXL02.9016C4Di55C20252.9 l46 kW7-15 ppm Ultra Low Sulfur DieselTier 4 (Final or Phase In)
SDZXL02.9020C4Di55C20252.9 l46 kW7-15 ppm Ultra Low Sulfur DieselTier 4 (Final or Phase In)
SDZXL02.9021C4Di36,420252.9 l28 kW7-15 ppm Ultra Low Sulfur DieselTier 4 (Final or Phase In)
SDZXL02.9118C5Ei55Eh20252.9 l46 kW7-15 ppm Ultra Low Sulfur DieselTier 4 (Final or Phase In)
SDZXL02.9119C5Ei55E20252.9 l46 kW7-15 ppm Ultra Low Sulfur DieselTier 4 (Final or Phase In)
SDZXL02.9120C5Vi77Eu20252.9 l93 kW7-15 ppm Ultra Low Sulfur DieselTier 4 (Final or Phase In)
SDZXL03.1041C3Oi23,520251.6 l28 kW300-500 ppm Low Sulfur DieselInterim Tier 4
SDZXL03.6018C4Di55F20253.6 l46 kW7-15 ppm Ultra Low Sulfur DieselTier 4 (Final or Phase In)
SDZXL03.6060Cfxi100D20253.6 l93 kW7-15 ppm Ultra Low Sulfur DieselTier 4 (Final or Phase In)
SDZXL03.6063C4Di5520253.6 l46 kW7-15 ppm Ultra Low Sulfur DieselTier 4 (Final or Phase In)
SDZXL03.6121C5Ei55E20253.6 l46 kW7-15 ppm Ultra Low Sulfur DieselTier 4 (Final or Phase In)
SDZXL03.6122C5Ei55E20253.6 l46 kW7-15 ppm Ultra Low Sulfur DieselTier 4 (Final or Phase In)
SDZXL03.6123C5Vi105Gu20253.6 l93 kW7-15 ppm Ultra Low Sulfur DieselTier 4 (Final or Phase In)
SDZXL04.1054Cfvi11020254.0 l102 kW7-15 ppm Ultra Low Sulfur DieselTier 4 (Final or Phase In)
SDZXL04.1056Cfvi115D20254.0 l102 kW7-15 ppm Ultra Low Sulfur DieselTier 4 (Final or Phase In)
SDZXL04.1125C3Ui8920254.0 l102 kW7-15 ppm Ultra Low Sulfur DieselTier 3
SDZXL04.8029D3Uc10020254.8 l102 kW300-500 ppm Low Sulfur DieselTier 3
SDZXL05.2124C5Ni170Km20255.2 l345 kW7-15 ppm Ultra Low Sulfur DieselTier 4 (Final or Phase In)
SDZXL05.7052Cfvi120B20255.7 l345 kW7-15 ppm Ultra Low Sulfur DieselTier 4 (Final or Phase In)
SDZXL05.7053Cfvi129A20255.7 l102 kW7-15 ppm Ultra Low Sulfur DieselTier 4 (Final or Phase In)
SDZXL06.1048Cfwt211U20256.1 l345 kW7-15 ppm Ultra Low Sulfur DieselTier 4 (Final or Phase In)
SDZXL06.1049Cfwt174U20256.1 l345 kW7-15 ppm Ultra Low Sulfur DieselTier 4 (Final or Phase In)
SDZXL06.1050Cfvi180C20256.1 l345 kW7-15 ppm Ultra Low Sulfur DieselTier 4 (Final or Phase In)
SDZXL06.1059Cfvi129A20256.1 l102 kW7-15 ppm Ultra Low Sulfur DieselTier 4 (Final or Phase In)
SDZXL06.1061Cfwt120U20256.1 l102 kW7-15 ppm Ultra Low Sulfur DieselTier 4 (Final or Phase In)
SDZXL07.1030D3Uc15120257.1 l178 kW300-500 ppm Low Sulfur DieselTier 3
SDZXL07.1031D3Cc20220257.1 l178 kW300-500 ppm Low Sulfur DieselTier 3
SDZXL07.1032D3Cc25020257.1 l338 kW300-500 ppm Low Sulfur DieselTier 3
SDZXL07.1126C3Ui18020257.1 l178 kW7-15 ppm Ultra Low Sulfur DieselTier 3
SDZXL07.8046Cfvi21020257.8 l345 kW7-15 ppm Ultra Low Sulfur DieselTier 4 (Final or Phase In)
SDZXL07.8047Cfwt291U20257.8 l345 kW7-15 ppm Ultra Low Sulfur DieselTier 4 (Final or Phase In)
SDZXL07.8051Cfvi250A20257.8 l345 kW7-15 ppm Ultra Low Sulfur DieselTier 4 (Final or Phase In)
SDZXL15.9058Cfyi520U202515.9 l345 kW7-15 ppm Ultra Low Sulfur DieselTier 4 (Final or Phase In)
RDZXL02.2110Cfdi55B20242.2 l46 kW7-15 ppm Ultra Low Sulfur DieselTier 4 (Final or Phase In)
RDZXL02.2111Cfdi44B20242.2 l46 kW7-15 ppm Ultra Low Sulfur DieselTier 4 (Final or Phase In)
RDZXL02.2112C5Oi18B20242.2 l14 kW7-15 ppm Ultra Low Sulfur DieselTier 4 (Final or Phase In)
RDZXL02.2114C5Ei55E20242.2 l46 kW7-15 ppm Ultra Low Sulfur DieselTier 4 (Final or Phase In)
RDZXL02.2115C5Ei44E20242.2 l46 kW7-15 ppm Ultra Low Sulfur DieselTier 4 (Final or Phase In)
RDZXL02.9016C4Di55C20242.9 l46 kW7-15 ppm Ultra Low Sulfur DieselTier 4 (Final or Phase In)
RDZXL02.9020C4Di55C20242.9 l46 kW7-15 ppm Ultra Low Sulfur DieselTier 4 (Final or Phase In)
RDZXL02.9021C4Di36,420242.9 l28 kW7-15 ppm Ultra Low Sulfur DieselTier 4 (Final or Phase In)
RDZXL02.9118C5Ei55E20242.9 l46 kW7-15 ppm Ultra Low Sulfur DieselTier 4 (Final or Phase In)
RDZXL02.9119C5Ei55E20242.9 l46 kW7-15 ppm Ultra Low Sulfur DieselTier 4 (Final or Phase In)
RDZXL02.9120C5Vi77Eu20242.9 l93 kW7-15 ppm Ultra Low Sulfur DieselTier 4 (Final or Phase In)
RDZXL03.1041C3Oi23,520241.6 l28 kW300-500 ppm Low Sulfur DieselInterim Tier 4
RDZXL03.6018C4Di55F20243.6 l46 kW7-15 ppm Ultra Low Sulfur DieselTier 4 (Final or Phase In)
RDZXL03.6060Cfxi100D20243.6 l93 kW7-15 ppm Ultra Low Sulfur DieselTier 4 (Final or Phase In)
RDZXL03.6063C4Di5520243.6 l46 kW7-15 ppm Ultra Low Sulfur DieselTier 4 (Final or Phase In)
RDZXL03.6121C5Ei55E20243.6 l46 kW7-15 ppm Ultra Low Sulfur DieselTier 4 (Final or Phase In)
RDZXL03.6122C5Ei55E20243.6 l46 kW7-15 ppm Ultra Low Sulfur DieselTier 4 (Final or Phase In)
RDZXL03.6123C5Vi105Gu20243.6 l93 kW7-15 ppm Ultra Low Sulfur DieselTier 4 (Final or Phase In)
RDZXL04.1054Cfvi11520244.0 l102 kW7-15 ppm Ultra Low Sulfur DieselTier 4 (Final or Phase In)
RDZXL04.1056Cfvt120U20244.0 l102 kW7-15 ppm Ultra Low Sulfur DieselTier 4 (Final or Phase In)
RDZXL04.1125C3Ui8920244.0 l102 kW7-15 ppm Ultra Low Sulfur DieselTier 3
RDZXL04.8025D3Uc10020244.8 l102 kW300-500 ppm Low Sulfur DieselTier 3
RDZXL04.8029D3Uc10020244.8 l102 kW300-500 ppm Low Sulfur DieselTier 3
RDZXL05.2124C5Ni170Km20245.2 l345 kW7-15 ppm Ultra Low Sulfur DieselTier 4 (Final or Phase In)
RDZXL05.7052Cfvi120B20245.7 l345 kW7-15 ppm Ultra Low Sulfur DieselTier 4 (Final or Phase In)
RDZXL05.7053Cfvi129A20245.7 l102 kW7-15 ppm Ultra Low Sulfur DieselTier 4 (Final or Phase In)
RDZXL06.1048Cfwt211U20246.1 l345 kW7-15 ppm Ultra Low Sulfur DieselTier 4 (Final or Phase In)
RDZXL06.1049Cfwt174U20246.1 l345 kW7-15 ppm Ultra Low Sulfur DieselTier 4 (Final or Phase In)
RDZXL06.1050Cfvi180C20246.1 l345 kW7-15 ppm Ultra Low Sulfur DieselTier 4 (Final or Phase In)
RDZXL06.1059Cfvi129A20246.1 l102 kW7-15 ppm Ultra Low Sulfur DieselTier 4 (Final or Phase In)
RDZXL06.1061Cfwt120U20246.1 l102 kW7-15 ppm Ultra Low Sulfur DieselTier 4 (Final or Phase In)
RDZXL07.1026D3Uc15120247.1 l178 kW300-500 ppm Low Sulfur DieselTier 3
RDZXL07.1027D3Cc20220247.1 l178 kW300-500 ppm Low Sulfur DieselTier 3
RDZXL07.1028D3Cc25120247.1 l338 kW300-500 ppm Low Sulfur DieselTier 3
RDZXL07.1030D3Uc15120247.1 l178 kW300-500 ppm Low Sulfur DieselTier 3
RDZXL07.1031D3Cc20220247.1 l178 kW300-500 ppm Low Sulfur DieselTier 3
RDZXL07.1032D3Cc25020247.1 l338 kW300-500 ppm Low Sulfur DieselTier 3
RDZXL07.1126C3Ui18020247.1 l178 kW7-15 ppm Ultra Low Sulfur DieselTier 3
RDZXL07.8046Cfvi21020247.8 l345 kW7-15 ppm Ultra Low Sulfur DieselTier 4 (Final or Phase In)
RDZXL07.8047Cfwt291U20247.8 l345 kW7-15 ppm Ultra Low Sulfur DieselTier 4 (Final or Phase In)
RDZXL07.8051Cfvi23020247.8 l345 kW7-15 ppm Ultra Low Sulfur DieselTier 4 (Final or Phase In)
RDZXL15.9058Cfyi520U202415.9 l345 kW7-15 ppm Ultra Low Sulfur DieselTier 4 (Final or Phase In)
PDZXL02.2110Cfdi55B20232.2 l46 kW7-15 ppm Ultra Low Sulfur DieselTier 4 (Final or Phase In)
PDZXL02.2111Cfdi44B20232.2 l46 kW7-15 ppm Ultra Low Sulfur DieselTier 4 (Final or Phase In)
PDZXL02.2112C5Oi18B20232.2 l14 kW7-15 ppm Ultra Low Sulfur DieselTier 4 (Final or Phase In)
PDZXL02.2114C5Ei55E20232.2 l46 kW7-15 ppm Ultra Low Sulfur DieselTier 4 (Final or Phase In)
PDZXL02.2115C5Ei44E20232.2 l46 kW7-15 ppm Ultra Low Sulfur DieselTier 4 (Final or Phase In)
PDZXL02.9016C4Dt55D20232.9 l46 kW7-15 ppm Ultra Low Sulfur DieselTier 4 (Final or Phase In)
PDZXL02.9020C4Di55C20232.9 l46 kW7-15 ppm Ultra Low Sulfur DieselTier 4 (Final or Phase In)
PDZXL02.9021C4Di36,420232.9 l28 kW7-15 ppm Ultra Low Sulfur DieselTier 4 (Final or Phase In)
PDZXL02.9118C5Ei55Eh20232.9 l46 kW7-15 ppm Ultra Low Sulfur DieselTier 4 (Final or Phase In)
PDZXL02.9119C5Ei55E20232.9 l46 kW7-15 ppm Ultra Low Sulfur DieselTier 4 (Final or Phase In)
PDZXL02.9120C5Vt77Eu20232.9 l93 kW7-15 ppm Ultra Low Sulfur DieselTier 4 (Final or Phase In)
PDZXL03.1041C3Oi23,520231.6 l28 kW300-500 ppm Low Sulfur DieselInterim Tier 4
PDZXL03.6018C4Di55F20233.6 l46 kW7-15 ppm Ultra Low Sulfur DieselTier 4 (Final or Phase In)
PDZXL03.6055Cfvi100D20233.6 l93 kW7-15 ppm Ultra Low Sulfur DieselTier 4 (Final or Phase In)
PDZXL03.6060Cfxi100D20233.6 l93 kW7-15 ppm Ultra Low Sulfur DieselTier 4 (Final or Phase In)
PDZXL03.6063C4Di5520233.6 l46 kW7-15 ppm Ultra Low Sulfur DieselTier 4 (Final or Phase In)
PDZXL03.6121C5Ei55E20233.6 l46 kW7-15 ppm Ultra Low Sulfur DieselTier 4 (Final or Phase In)
PDZXL03.6122C5Ei55E20233.6 l46 kW7-15 ppm Ultra Low Sulfur DieselTier 4 (Final or Phase In)
PDZXL03.6123C5Vi105Gu20233.6 l93 kW7-15 ppm Ultra Low Sulfur DieselTier 4 (Final or Phase In)
PDZXL04.1054Cfvi11020234.0 l102 kW7-15 ppm Ultra Low Sulfur DieselTier 4 (Final or Phase In)
PDZXL04.1056Cfvi115D20234.0 l102 kW7-15 ppm Ultra Low Sulfur DieselTier 4 (Final or Phase In)
PDZXL04.8025D3Uc10020234.8 l102 kW300-500 ppm Low Sulfur DieselTier 3
PDZXL04.8029D3Uc10020234.8 l102 kW300-500 ppm Low Sulfur DieselTier 3
PDZXL05.7052Cfvi120B20235.7 l345 kW7-15 ppm Ultra Low Sulfur DieselTier 4 (Final or Phase In)
PDZXL05.7053Cfvi129A20235.7 l102 kW7-15 ppm Ultra Low Sulfur DieselTier 4 (Final or Phase In)
PDZXL06.1048Cfwt211U20236.1 l345 kW7-15 ppm Ultra Low Sulfur DieselTier 4 (Final or Phase In)
PDZXL06.1049Cfwt174U20236.1 l345 kW7-15 ppm Ultra Low Sulfur DieselTier 4 (Final or Phase In)
PDZXL06.1050Cfvi180C20236.1 l345 kW7-15 ppm Ultra Low Sulfur DieselTier 4 (Final or Phase In)
PDZXL06.1059Cfvi129A20236.1 l102 kW7-15 ppm Ultra Low Sulfur DieselTier 4 (Final or Phase In)
PDZXL06.1061Cfwt120U20236.1 l102 kW7-15 ppm Ultra Low Sulfur DieselTier 4 (Final or Phase In)
PDZXL07.1026D3Uc15120237.1 l178 kW300-500 ppm Low Sulfur DieselTier 3
PDZXL07.1027D3Cc20220237.1 l178 kW300-500 ppm Low Sulfur DieselTier 3

Other nonroad diesel engines makers

Source

US Environmental Protection Agency engine certification data. Model year and manufacturer are decoded from EPA engine family codes (EPA codes:DZ1, DZ4, DZ5, DZ6, DZ7, DZX). An engine family is a group of engines certified together; one family can cover several power ratings.