Apart from being a bit quicker what are the benefits of a early R in comparison to the Xk8, or are there any downsides, realsie insurance a little more. Are parts still the same?
No downsides only up Fuel consumption is a few MPG worse in daily driving, insurance is little difference for most. Engines are different, that extra 100BHP helps. Running costs etc. must be virtually identical. Has to be an R