UPDATED: Expanded on the categorization aspect.<p>Your design is absolutely gorgeous, and that's worth visiting the site for alone.<p>The categorization is a little wonky, and while it may technically be true (if it is), I think it's going to confuse other people than me; Sedan, Hatchback and Crossover seem <i>and</i> look to similar judging by their icon. Maybe they should be merged, or the main categories should be based on something else. To someone who knows jack about cars, they all look like station cars to me. Heck, upon closer inspection, some of the Hatchbacks and Crossovers look like SUVs or Minivans.<p>Some people will probably be interested in several similar categories. I'd try enlisting the feedback of your users to understand how they categorize cars and apply at least some of that methodology.<p>Think about how people buy cars; if you need a big car to transport heavy loads or compensate for something, you have an SUV.<p>If you're a mother of three, you'd want a "Family Car" (although that's a tough sell to the husband).<p>Some people, myself and probably some women in their 20s, like "Small Cars", like Mini Coopers, Fiat Grande Punto and their ilk. The Punto is a great city car that's cheap on petrol, easy to navigate, and even easier to park. These cars are like the purple Dell laptops to some women.<p>Then there's the Sportscar (or Mid-Life-Crisis Car, but let's just call it a Sportscar). No need to delineate convertibles nor two-seaters and so forth.<p>I'm sure there's a general consumer pattern - a car buyer archetype - that you can use to your advantage. Quora has so many quirky people that there might be someone with that knowledge. This is probably a vital thing to figure out, and basing it on buyer trends might be a good idea - as long as you don't create category frameworks that overlap in domains.<p>As for relevant metrics, I would suggest MPG (bio/electric/hydrogen vs. diesel vs. unleaded) and the Euro NCAP[1] score. The latter probably requires API access, but nevertheless.<p>EDIT: What are those coloured boxes supposed to signify? Granted, I'm an idiot, but I thought they were filter links for age groups at first.<p>[1]: <a href="http://www.euroncap.com" rel="nofollow">http://www.euroncap.com</a>.