Please recommend a service to provide me a database of car modals and specs

Hi guys,

I’m currently developing a car classifieds site, to make the process easier for the user we want them to select their car by year, make and modal (European cars) which will automatically input most of their car specs for them (top speed, fuel type, transmission type etc). Everything I have found online provides incomplete data or is more for US modals. Where do the big companies such as get their data from?

Many thanks

At my last job we used this service for our newspaper auto classifieds.

We used the edmunds one before switching to chrome.