This is why I have such a great respect for what little remains of the British Auto industry.
Many years ago, there was a company that went by the name of the Light Car Company. Like Ronseal, it did exactly what it said on the tin. Their first car weighed in at 406kg, with a 143bhp bike sourced 4 cylinder engine did 60 in 4.4 and 145mph
This car, the Rocket, was intended to have a big brother, the Lightning, with a V8 crafted from two bike engines - all of the lightness, all of the power, but more torque.
Unfortunately, the idea went on the back burner.
Now however, after finding new financial backing, the bike derived V8 is back.
RST V8:
2000cc
340bhp @ 10,250rpm (can go up to 15,000 if the application requires)
190lb ft @ 7000 - 7800rpm
Length: 19" (48cm)
Width: 19"
Height: 19"
Neatly dropped into a Catherham SV it hits 60 in 3.4, and is geared for 150mph.
Pics, info from Evo.