ok, i decided to do a test to show the difference in power output when stationary.
The car I used is the #97 Tekno auto VF Commodore, which has 462KW 650NM of torque and revs to about 7800rpm.

(graph is in KW and NM)
first test is a direct comparison of power output with no load on the engine
stationary:

rolling:

i have tried to get the engine rpm matched as closely as possible, both pics where taken as the rpm is still climbimg so the engine is only under is own loading, but you can already see a pretty big difference.
second test is the same although this time using 50% throttle, and again both pics taken as the rpm are still increasing.
stationary:

rolling:

again trying to keep the rpms as close as posible, this test at 50% throttle while stationary the car will not hit the rev limiter but while rolling it could. and again pretty big difference in power outpu.
test 3, capturing the power output as the clutch grabs and begins to put load on the engine.
stationary:

rolling:

now this is were it gets really interesting, as load is applied to the car when its stationary the car doesnt make eneough power to get the wheels spinning so the rpm drops quickly, causing the even less power and by the time the car has started rolling the rpms are so low that the car either bogs as its fallen into the low end of the power band or it will stall.
and here is a bonus pic of when the car actually stalled on launch:

notice 100% throttle, the clutch is engaging but zero power, this is because the clutch has started grabbing as the engine hit redline as the power is breifly cut to allow the rpm to drop the clutch is grabbing and the rpms are still dropping and byt the time the the engine kicks back in the rpms have dropped far enough that with the reduced power output when stationary, the engine just does not have the juice to get the car moving.
Edit: just to add some extra info, these test were done on the controller, and freshly booted game and console, without using any other apps or minimizing the game.
Edited by user Tuesday, January 12, 2016 6:31:07 AM(UTC)
| Reason: Not specified