Recently when I was testing out some setup with the AI I noticed a few things...

- Even when the XFG's had all WR (or close to) setups, that could not beat the XRG and their tyres blew before the XRG's did.
- The XRG's top speed at the end of the backstretch before the cars began braking was AT LEAST 188 kmh. Even with my (crap) setup.
- The XRG also eats up less fuel, or so I think... 0.2 less than the XFG.

This is just observation during qualifying with AI, will update this post when the AI's finish a 1 hour race.

The AI's are not even remotely useful in making meaningful comparisons about anything. For one, they don't know how to exploit the car to it's full potential. Plus they drive very differently from any human.

Quote from GTR_Yuni :

- Even when the XFG's had all WR (or close to) setups, that could not beat the XRG and their tyres blew before the XRG's did.

The AI drivers optimize their laps, and for the XFG this means that they drive over the kerbs at the exit of the chicane. This is hard on the tyres, so these will blow up in a long race. The AI is not smart enough to reckon with that.

Quote :

- The XRG's top speed at the end of the backstretch before the cars began braking was AT LEAST 188 kmh. Even with my (crap) setup.

The straight at Blackwood is so long that both cars will always reach their top speed, even with the worst setup and driver.

Quote :

- The XRG also eats up less fuel, or so I think... 0.2 less than the XFG.

Not necessarily. The fuel is shown in %. The XRG is likely to have a larger tank than the XFG.