You say that, but I see from the brochures that the official combined figure for the 2 seater is 19.6, as compared with 18.2 for the 4 seater. So there's a price to pay for you guys that are dragging around all that extra weight!
(and that's before you put your guests in the back)
On a related issue, given that the extra 10 horses on the later cars came from a software upgrade, can this be retro-fitted to the earlier cars? (Not that I'm sure I'd notice, but it would be nice to know whether it's even possible.)