Lexus Reveals More About Gs F

[Monyx]

Lexus details on GS F

Is the Torque Vectoring Differential (TVD) something completely different to IS F?

Larger OEM tyre sizes, 9 & 10" width rims respectively, interesting maybe base my tyre replacement on these though is 275 too big for 9" rim?

255/35R19(Fr)

275/35R19(Rr)

Even @ 1830kg power to weight ratio exceeds the smaller IS F (1.82 kW/tonnw vs 1.92) thanks to 40 more kW

[Lexus Nerd]

Is the Torque Vectoring Differential (TVD) something completely different to IS F?

Absolutely, yes. TVD is different to the Torsen LSD or other differentials fitted to IS F. I haven't found a good technical explanation from Lexus on what it does but, to quote Yahoo! Autos, "electric motors control clutch packs that can shift up to 100 percent of the power to an outside wheel, based on steering and yaw sensor input, all to get the RC F around a corner in tighter fashion."

To quote Lexus: In Australia, "a Torque Vectoring Differential (TVD) is fitted as standard to the RC F which offers a greater level of control based on a range of vehicle conditions like accelerator pedal and brake operation. Three TVD modes can be selected using the switch located on the centre console. Standard mode delivers a high level of both agility and stability, while Slalom mode places emphasis on steering response for the kind of agility that you would expect from a smaller vehicle. Track mode, meanwhile, offers stability during high-speed circuit driving with tuning that enables you to accelerate with confidence. These modes aren't linked to Drive Mode Select and offer you an even greater level of personalisation for your driving experience."

According to numerous RC F reviews, TVD makes a dramatic difference to handling, compared to a Torsen LSD. Most reviewers who bagged the RC F in handling were actually driving the test vehicle with Torsen LSD, whereas those who tested the TVD loved it. It also helps the RC F beat the M4 on a winding track, despite its extra weight.

I'll leave it to others to answer your questions on tyre fitment.

Edited January 9, 2015 by Lexus Nerd
grammar