Data Sources & Disclaimer
Where Car Data Index gets its vehicle data, how we verify it, and the limits of specification accuracy by market and model year.
Data sources
Car Data Index compiles vehicle data from:
- Manufacturer publications, data sheets, owner's manual specifications and press materials
- NHTSA, the U.S. National Highway Traffic Safety Administration public vehicle databases, including the vPIC vehicle identification dataset used by our VIN decoder
- EPA, official fuel-economy certification records published at fueleconomy.gov
- Type-approval documentation, publicly filed certification data in various markets
Verification standards
Each record is checked against at least two independent sources where possible. Conflicting figures are resolved in favor of official certification data for the market specified. Despite this process, errors can occur, treat every value as a well-sourced estimate, not a guarantee.
Market variation warning
The same model name can describe meaningfully different cars in different countries. Engine output, emissions equipment, gearing, dimensions and even body structure vary by market and production date. Where our figures cite EPA (US-cycle) economy, European WLTP or NEDC figures for the same trim will differ, the testing cycles are not comparable.
Performance figures
0–100 km/h and top-speed figures are manufacturer-claimed or manufacturer-consistent press measurements achieved under ideal conditions. Real-world results vary with tires, weather, fuel, load and vehicle condition.
No affiliation
Car Data Index is an independent reference and is not affiliated with, endorsed, or sponsored by any vehicle manufacturer. All trademarks remain the property of their owners.
Report a correction
Found a figure you believe is wrong? We want to know, use the contact page and include the page URL and your source. Verified corrections are typically published within one week.