PromtEngine
Engines
Every engine family certified with the US EPA, by category and manufacturer — power ranges, emission standards over time, and full family lists.
Engine families34,392
Manufacturers277
Categories6
75 manufacturers · 16,867 familiesNonroad diesel enginesIndustrial and off-road compression-ignition engines for construction, agricultural and generator equipment.
108 manufacturers · 6,035 familiesMotorcycle enginesEngines certified for highway motorcycles.
99 manufacturers · 5,245 familiesOff-road motorcycles, ATVs and UTVsEngines for dirt bikes, all-terrain and utility vehicles.
33 manufacturers · 3,544 familiesMarine diesel enginesCompression-ignition engines for boats and vessels.
19 manufacturers · 2,409 familiesMarine outboards and jet drivesSpark-ignition marine engines: outboards, sterndrives and personal watercraft.
4 manufacturers · 292 familiesSnowmobile enginesEngines certified for snowmobiles.
Engine calculators
Torque, power and BMEPPower from torque and RPM · Torque from power and RPM · Brake mean effective pressure (BMEP)Engine displacementDisplacement from bore, stroke and cylinders · Bore from displacement and stroke · Stroke from displacement and boreBSFC and thermal efficiencyBSFC from power and fuel flow · Fuel flow from power and BSFC · Thermal efficiency from BSFCCompression ratioStatic compression ratio · Chamber volume for a target compression ratio · Theoretical compression pressurePiston speedMean piston speed · Maximum RPM for a piston speed limit · Rod ratio, piston velocity and acceleration
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