Yeah it doesn’t look very stable at all. The looks themselves are mediocre, too. The engine is more suited to a train, something big and heavy that needs a lot of torque. But my bet is that the power comes from 10,000 mult thrusters. Therefore, the reason the car is so fast is probably that it is light. If you used such powerful thrusters, you would need a heavy vehicle for it to not shake everywhere, which negates the power it gives. I know this because almost all my engines need 10,000 multiplier thrusters to get up to any semblance of torque.
And it’s a four cylinder engine. Your two adjacent cylinders are welded together, so there are really only 4.