...short answer...CayS of course...

...forget comparing RR Sport with CayTT...it's a completely different performance level/league...

...some of you mentioned a stronger Rover unit RR Sport Supercharged (RRSuper) and attempted to compare it with CayTT... ... seems like "Supercharged" in a RR name confused you...

...some cold facts for you...

RRSuper is ACTUALLY slower, than BOTH CayTT and CayS!!! It is slower, than CayS, eventhough having more HP "on paper"...There could be ANY OTHER criteria for your selection of RRSuper, but performance IS NOT ONE OF THEM...and for these all other functionality criterias a cheaper regular lux RR V8 may be a smarter choice...

...seems like some of you fall for FORD SALE/MARKETING propaganda expressed in a car NAME, but NOT expressed in a REAL performance figures...

...here are performance reference figures for your selection...RRSportSupercharged (RRSuper):

Technical data V8-Kompressor, in front lengthwise built * capacity 4197 cm3 * achievement 291 KW (396 HP) with 5750/min * torque 560 Nm with 3500/min * permanent all-wheel drive * six-course mechanism * independent suspension with pneumatic cushioning * trunk 535/2122 litre * tank of 105 litres * L/B/H 4972/1956/1902 mm * tire 255/50 R 20 * unloaded weight 2632 kg * point 210 km/h (abgeregelt) * 0-100 km into 7,5 s * consumption 16.0 l/100 km * price 99,900 euro

...more at:

RRSuper statistics