DLR heres where i would put these cars in terms of Class. All these car time launch quickest tunes by me and dream00 and Janco. Tuned them for dannys leaderboard. SL600 runs 9:267, SL65 runs 9:377. Speed 12 runs 9:277, Zonda C12s 7.5 runs 9:240. These cars will run with and beat the r34,, Gallardo, McClaren MP4-12C '10, they won't beat but run even or slightly behind Z06, ZR1, Ford GT '02, Ford GT LM Spec II Test Car. These are all 9:2sec cars. Another 9:2sec car people underestimate is the Zonda R Race car for the road runs 9:270+'sec 1/4M times too.
The Cien runs 9:194 will keep up with any 9:1 sec car including GT-R '07, GT-R Black Mask '07, GT-R Concept (Tokyo Motor Show 2001), audi R8, Ford GT '06, Nuvolari quattro, Viper GTS-R, Viper GTS '02, RS6 Avant '08, SLR '09 (19 Inch Wheel option), SLR McClaren '03, Ford GT '05 (Stripe), GTS '99, Murcielago LP-640, the Z06 RM, ZR1 RM. All other standard r34's.
The McClaren F1 only runs 9:340's 1/4M, so it will run with an SL65, Audi R8 5.2, AC Cobra premium all 9:3sec cars. The SL65 has a low poweband on mid turbo with Mid Turbo giving out 1000bhp rather than 983bhp as normal people might tune them. The McClaren has too much wheelspin is too light and so is the Speed 12.
One car you need to put near the R35 GT-R TC is the Toyota Minolta 88C-V Race Car '89. With good tree you can keep up with and beat a R35 GT-R TC. I never tuned it but this thing runs 8:7's...