If you are looking purely in terms of power and torque then it is a no-brainer.
The +8 is a Vee8 which in its largest capacity version was 4.6 litres and according to at least one source developed 218bhp and 300 ft/lb of torque.
The +4 ( unless I've lost the plot and you are referring to the 'old' TR engined car or the more recent but now discontinued Rover -engined versions?) is a four cylinder, two litre Ford Duratec engine which in its Morgan version is claimed to give out 145 Bhp @ 6000 rpm with max torque being 162 Nm (119lb/ft) @ 4600 rpm
(MMC have stated that the limited edition Supersport version +4 will develop in the region of 200BHP but it is still by the very nature and size of its powerplant not going to give the torque of the 'eight'
A much better comparison with the +8 is that of the Vee6 engined Roadster, for which MMC claim (223 Bhp @ 6250rpm with max torque being 187 Nm (140lb/ft) @ 4500 rpm
HTH
G
PS There is also the small- but important -issue that it's a Vee 8, so it's the DBs as far as sound is concerned!! The downside is that at the moment, the prices being asked for any halfway decent car are, to my way of thinking at least, OTT and a lot of sellers really do seem to have an inflated view of what very ordinary examples will command.
