It's likely a 1275...he really has it singing. Wonder if he is running the 4.22 or 4.55 rear end? The 911 really blows the Mk-3 Sprite away on the straightaway...but the Sprite does seem to out-handle the Porsche.
In my old Mini racing days we used 1275s but some had them taken out to 1400 and 1500 which were very fast but tended to burn pistons, the A series engine was ahead of its time but the basic design is about 70 years old! Just goes to show how good the engineering was all those decades ago.
Even with just a 1.6 litre engine from a Spitfire (originals had 1.0L and 1.1L) the Sprite only weigh about as much as a sparrow's fart. Heh, hard to imagine a sports car with 43bhp isn't it?
