Why can you not have twin engine cars on the road?

[scared but happy]

As title says. If it is due to scrabbing I thought some of the old 4x4 (Sierra) had that problem anyhow.

[scared but happy]

Dont they share a driveshaft? I mean engine drive front and seperate engine for the back.

[scared but happy]

But they are all driving on one axle/gearbox ?
If not I will go and find a box to sit in.....Ah, here we are

>> Edited by scared but happy on Monday 6th March 12:23

[scared but happy]

Sorry scrubbing. As in scrubbing of the tyres if not running at same speed.