For what it is, the Bentley is exactly what it should be. With the W12 pushed up to 463kW, the wider track, new dampers, suspension, massive carbon-ceramic brakes and the replacement of the back seats with a carbon strut brace, the Bentley has lost 110kg. However they have kept it stocked with enough features to apeal to the market they were after, current Bentley owners or those after a sportier GT car.
To build it in aluminium would have required a complete redesign of the chassis due to the different properties of the two metals.
The ultimate limit is the price. How much would people be willing to pay for a heavily tweaked Conti GT Speed with manufacturer warranty?
"Some days, you just can't get rid of a bomb!"
"Life is short, drive fast!" - Lamborghini
"How's that for a slice of fried gold?"
"I'll take the case!" - Harvey Birdman