My mate has a mini with 1275 kandn nice cylinderhead and bigbore exhaust and the acceleration is almost identical to my cortina which is 1600cc with 32/36 carb and straight through zorst an a 4 speed box! A lot of the time i seem to be catchin up ever so slightly but its very close. Id say the cortina may just have the edge, they aren't as heavy as they look, i pushed mine up a big hill by me when i ran out of petrol! big empty boot no big struts or bulky inner wings and they are actually smaller than a lot of people think. Let a bit of air out the rear tyres for a better footprint, and fingers crossed! How many people you taking down? you could always strip the interior for the weekend, take a bit of octane boost!