 Critics of the car consider it underwhelming for such an expensive , powerful and high performance machine . Motoring journalists have been critical of the interior and the car itself for being too comfortable and lacking the sense of occasion present with other supercars . Commentators who approve of the interior have criticised the luggage space as being " largely useless " . Journalists and other commentators often bemoaned the lack of the Jaguar V12 engine and other technical components fitted to the concept car . Contemporary reviews pondered on whether the sales performance and residual values would have been improved by sticking more closely to the specification of the concept car . 
