The original MP4-12 was an F1 car, known for the following features -
1) it was winter tested in traditional McLaren orange, before changing to sponsor colours for the first race. Sunday Times report that MP4-12C road car launch colour will be orange.
2) It's engine (and therefore the whole car) had a lower centre of gravity than its rivals. (Note - current F1 engines have their C of G heavily regulated & limited) Lets hope that that is also a design feature of the road car.
3) It had "fiddle brakes" i.e. 2 brake pedals. The driver could apply the brake to an individual rear wheel to control wheelspin. This was banned within 1 year. It seems inconceivable that the road car would have 2 brake pedals & manual control of individual wheel braking BUT at least 1 major website is reporting that the road car has "brake steering" - presumably an automatic version of the F1 car's fiddle brakes.
Can't wait to find out which of these references (if any) are relevant to the choice of name.