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Emission Certification Data

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UK: New Car Fuel Consumption and Emission Figures

Vehicle Certification Agency (VCA)

Emission certification and fuel consumption figures for new cars in the UK. Available as both an on-line searchable database and an Excel/Access file.
US: Certification and Compliance for Vehicles and Engines

US EPA

Emission certification information for onroad and nonroad vehicles and engines.
US: Annual Certification Test Data for Vehicles and Engines

US EPA

Emission certification data for light-duty vehicles and motorcycles, as well as heavy-duty engine data for model years 1979-1994.
US: Engine Certification Data

US EPA

Emission certification data on heavy-duty CI onroad and nonroad engines, marine SI engines, marine CI engines, locomotive and snowmobile engines, and small utility engines.
US-California: Onroad Certification Database

California ARB

Emission certification data and California Executive Orders for onroad vehicles and engines.
US-California: Off-Road Certification Database

California ARB

Emission certification data and California Executive Orders on off-road diesel engines, small off-road spark-ignition engines, and spark-ignition marine engines.