Why is everybody downplaying torque like it's a bad idea? Torque is what pushes you in your seat and keeps it charging forward. Ever try to top out a real car? Notice how there will be a point where air resistance overcomes the forward force of the car? When you hit this "wall of air", you basically ran out of torque.

Now with 2 engines of course the maximum rpms is gonna be the same, but the running conditions it will yield more dynamic rpms. And since you're doing custom gearing anyway of course you're gonna gear this car to the moon. This is where torque comes into play. You can push a tall gearing that no single engine setup could ever do!

Big engines = Big speed period! Look at the Z05 and the Viper. Big displacement V8's and 10's. Those cars have big torquey engines to push big speed. It's crazy how their first gear stretches all the way out to near 60... because they can with all that torque.