The RT12 has a great engine and this is giving it an advantage in straight line, however aerodynamics do not seem to have worked right for RUF, front lift and insufficient downforce in the rear is not helping with handling in mid- high speed turns, they both do help however with high speed acceleration runs.

The suspension also does not seem to be a full success story. One needs to keep in mind the weight disadvantage however.

All of this comparing to the factory 997GT2, which is of course a very striong rival. Even the 997 GT3, 997TT and 996GT3 have faster speeds than the RT12 in quite a few of these turns listed below as well.

Some data by looking at the times turn by turn (first is the 997GT2, second RT12) show quite clearly the disadvantage of the RT12's handling and weight.

- Dottinger Hohe: 293 kph vs. 308kph (great strength for the Rt12 in straight line acceleration)

- Hatzenbachbogen: 152 kph vs. 145kph RT12

- Flugplatz: 172kph vs. 171kph RT12

- Shwedenkreuz: 266kph vs. 270kph (again high speeed RT12)

- Aremberg: 105kph vs. 100kph

- Fuchsrohe: 252 kph vs. 246 kph

- Metzgesfeld:160 kph both the same

- Ex-Muhle: 121kph vs. 111kph RT12

- BergWerk: 106 vs. 108 kph (RT12 wins here)

- Kesselchen: 249 kph vs. 250 Kph (RT12 wins again)

- Klosteral 1: 165 Kph vs. 178 Kph (RT12 crashes it)

- Hohe Acht: 116Kph vs 109 Kph

- Brunnchen: 111Kph vs. 108 Kph

- Pflanzgarten: 196 Kph vs. 189 Kph

- Schwalbenschwanz:229 Kph vs.227 Kph

Slalom 36 m:

- 997 GT2: 139 Kph
- RT12: 134 KPh
- 997TT: 134 Kph

Another couple of weaknesses:
80-180 Kph in 5th gear:
997TT: 9.6s.
RT12: 10.5 s

80-180 Kph in 6th gear:
997TT: 13.5s
RT12: 15.7s.