in one way plu myou're right put a 130bhp diesel up against a 130bhp petrol car the petrol car will probably win, but thats not from lack of power or speed, its lack of driving skill, the diesel powerband dies before the readline and knowing when to chabge gear is very important, too early and you miss peak power, too late and performance drops off. in petrol car its as simple as get to the redline in 90% of cars. Diesel engines are heavy so a little harder to launch but if done right the low down torque will pull the car off the line.
on the 1/4 it would be close, but on the road in real world conditions the diesel will pull hard immediately whereas the petrol car would need to drop a gear or maybe even 2 to get the revs up