My own thoughts are that the Elise already has the 4pot, the Evora has the V6, so the Esprit MUST have the V8.
You can have a reasonably small capacity V8 turbocharged to produce a decent dose of WHHHHOOOAAAAOOOOOOOOOOO!
Just look at the 2004 Esprit or the S350. These are, effectively, detuned race engines.
The engine was designed to be light weight and capable of lots more power. Emissions and the Renault tranny etc cut it all back to the 350hp the car has.
I suspect the if the Government allowed concessions for green fuels, such as bio-ethanol, Lotus could make a small V8 with enormous power, such as the Exige 260 or whatever they called it. All it need is the ECU programmed correctly, the injectors, pumps, fuel tanks and lines made to cope with the slightly corrosive nature of the fuel and bobs your uncle. OK maybe one or two other mods but its not beyond the wit of Lotus
Trouble is, the Guvvinment and Gordo the CRETIN are only interested in TAX RECEIPTS. >>>Which means they will ignore bio-ethanol and deal with crude oil fuels and tax them to death while slagging them off for being non green and deathly polluting.
Lotus have to juggle the technology with the POLITICS! Its all unfair and completely nuts really....
If I was PM ...