Check this out.

Mosler (USA ???) Twin-engined Eldorado. This car was kindly identified by Chris Hardegger, a Swiss friend who is also a Cadillac toy car collector. Called the Twin Star, this unusual creation is manufactured by a company named Mosler. The car is equipped with two Northstar engines, the standard one in front and a second one in the trunk. It has a top speed of 200 mph. For more details, check out the manufacturer's Web Page: www.moslerauto.com. Chris kindly supplied also a couple more photos for the Database.

The back end looks funky but 200 mph? Wonder what the combined HP and torque is. Double?

Some more info here:
http://www.supercars.net/cars/2000@$Cadillac%20Mosler@$Twinstar%20Eldoradog.html

I saw this car a while back and I really don't think there was as large of a performance gain with the dual engines as possible.

The 0-60 is just above five seconds I think. According to the second link which is where I saw it, it's 575 bhp@5750 rpm.

If they distributed the power output differently than just doing a front engine to front wheel, etc. system, I think there could've been awesome performance results.

Also, the back end is like that so the rear engine can be connected to the engine directly.

It's a very awesome idea though >:)