After gearing, you'll have the same order of magnitude torque at the wheels as the Tesla.

Randomly picked example: Porsche G97/01 (997 Carrera 2 2005-08) First gear total reduction 13.45 (gear 3.91, rack&pinion 3.44)

So, ignoring efficiencies, you'd have a first-gear torque of 400Nm * 13.45 = 5380Nm at the wheels. Still "only" half of the Tesla, but not an earth-shattering difference anymore.