+1 The good side with hybrid is that you can keep H/R NA engines, like for example 918 Spyder, NSX MkII (if it comes),... The i8 however has a much smaller and turbocharged engine, but is rather a sportscar than a supercar, it also has four seats. And concerning the weight, the i8 seems to be the lightest at 1400 kg dry. However this could change until production, it could get heavier. The downside of it is still the hybrid adds aot of weight, so a hybrid car and only be built from scratch as a hybrid, cannot be based on a normal car. To see whether hybrid is really worth, in terms of performance, we should compare let us say a 918 Spyder against a 918 Spyder with all hybrid hardware deleted. Just this would shave off some 300 kg. And maybe without hybrid it will be slower on straight line and have no "turbo low range toruqe" but should feel better without the added weight. I think I'd still prefere a 550 PS, 1375 kg 918 Spyder than a 740 PS, 1675 kg 918 Spyder Hybrid. PS: Is it going to be a 3,4l V8 or a 4,6l V8?