Well i rekon if the disco had a spare wheel on the back, and a radio in it, then the extra weight would have alowed the landy to plough straight through the espace!!!!
And it looked like the landy was going much faster!!!
If you listened to the commentry you'll notice how they made a big speech about the Renaults strengthening beams transferring the impact along the car. They took deliberate advantage of that against the weaker parts of the LR.
As you might expect they didn't make it a fair challenge or they would have given the LR chassis a chance to prove its worth by hitting them chin to chin.