Algodoo

Another ridiculously large tank, although not as ridiculously fast as the others.
Rudimentary enough, having not bothered with any clutch or gears; just direct Ratchet transmission to the drive chain.

Uses my Stamp engine principle, and just upscales it, making a pretty smooth runner for such a crude spawn engine.

Running the engine with the ignition on does take quite a bit of processor power, and not helping with that is the direct increase to power output with simulation frequency.
For my rig, I've found that 200Hz is a sweet spot.
You can run it with the ignition off, but that's having gotten it going in the first place with the ignition. The orange springs at the top are negative dampers: Tweak these to get this thing running as a spring engine to save processing power.
(Current spring setting will allow the course to be completed without assistance).

There's a course Rightward to drive over.
Operation instructions in-scene.

Average speed: 45mph.
(As oppose to the Mach 2.45 of my Triaros tank).