A90 Supra vs Z4 M Drag Race - Carwow © Everyone knows that these two cars are very closely related, especially diehard Supra fans which are understandably disappointed in the lack of a unique Supra. They both use the same platform, same drivetrain, and even the same tires. As we all know by now, both cars share the same BMW platform, BMW straight six engine, and ZF 8-speed automatic transmission sending all power to the rear wheels. They're both even built at the same BMW plant in Austria. However, the engines are actually slightly different in the US, where the Z4 uses the B58B30B version of BMW's venerable 3.0 litre turbocharged straight six making 382 hp. In other (global) versions, however, it uses the B58B30C version making 335 hp. All A90 Supra's supposedly use the B58B30C, though. Since those aren't US cars, they should both be using the same version and both making the same 335 hp and weigh nearly the same, so they should be nearly equal... or are they? ...
A couple of weeks ago, I posted my first impressions of Michelin's PSS vs Firestone Firehawk Indy 500 tires. I've run PSS's for several years on the Boss, but I'm trying the Indy 500's for the first time. In short, I was worried about the narrower tires (I was running 285/35/18 PSS but could only find the Indy 500 in 275/35/18) and tread squirm, but I was happy with them up to that point just driving on the street. I had the chance to drive on them for three track days now. So what were they like? After my first session, they made an impression that basically persisted for the rest of track sessions on them. Phenomenal, unmatched value. Now, if value is something that stands out above all else, it typically means the compromise between qualities you want and those you don't is less than ideal, but the value is attractive. This is no different. I'll start with the bad, which really boil down to two: ultimate grip and grip longevity. Grip is noticeably l...







