FTO Super Touring Car is in the game, but it's 4wd, and has 445hp.
Finally finished the race, the Integra RM was just slightly behind my Lotus Elise RM at the end of 4 hours - about 45 seconds from finishing lap 27 in the Integra, vs. 5 seconds in the Elise (I had to sandback the last 5-10 seconds in the Elise to comfortably avoid doing a 28th lap). I did have to pit a lot more frequently, going through a set of front tires every 3 laps in the Integra.
I haven't really tried out the Xsara Rally Car to see how it's handling compares, but mine only has 517PP fully tuned, vs. the 543/548 I could get out of the Honda RM's. Though not that it matters much to me anymore now that I have this race done. Only 2 more runs of the 4hr Nurb Enduro planned, and those are going to my DeLorean (an RR car), and possibly the GT-R prototype (listed as a "---" drivetrain).
Not the fastest FF in the game but one of the best... any one of the GK Tiburons. Tib GT, Tuscani, FX Coupe, and the CCS are all decent cars. Should end up with about 400 hp and weigh 1115kg (512pp). I let my friends use cars up to 535pp (any drivetrain) and they still couldn't find victory against the Tib haha great car.