I think you've never driven a big modern engine diesel car. I have driven this BMW 535d[0] and believe me this monster is not "slow" in any way (0-100km/h in 5.5 seconds). It accelerates faster than the petrol equivalent because of the more torque it produces.
Sure, a big engine diesel is quick, but small-engine ones are slow. The lack of top-end power makes them suffer at highway-speed passing. The diesel Cruze, for example, has a 5% (4mph) lower trap speed at the end of the quarter mile over its gas sibling (with the same 0-60).
Also consider that 3.0L I6 diesel has the same 0-60 as a 2.0L turbo four-cylinder Honda Accord, but a huge reduction in highway acceleration (traps 98mph vs. 103mph in the Accord).
Diesels have better torque, which is mostly what feels like "power." Few people travel at top speed, so lower horsepower does not have the same feeling to the driver as high torque.
Diesels have literally the worst powerband for automobiles, especially mated to automatic transmissions. Diesels have power down low in the RPMs, but that's never where you are when you need power. When you need to accelerate, you floor the throttle and the transmission downshifts into the upper RPMs.
They are good for accelerating 0-40, but they are significantly slower at 40+ -- which is where most people accelerate hard, like merging on the highway or passing.
When I merge onto the highway, I use 5500-7000rpms, when I don't want to accelerate quickly, I use 2000rpms. It's why I hate driving diesels: 280ft-lbs at 2000rpms is useless and only 105hp; I want 280ft-lbs at 6500rpms (345hp).
No replacement for displacement does hold true for diesels. I've seen some crazy fast, crazy large diesel pickups at the drag strip. 3.0L is about the displacement diesels can start making power, anything below that the limitations of physics are holding it back.
And petrol cars don't smell?
> slow to accelerate
I think you've never driven a big modern engine diesel car. I have driven this BMW 535d[0] and believe me this monster is not "slow" in any way (0-100km/h in 5.5 seconds). It accelerates faster than the petrol equivalent because of the more torque it produces.
[0]http://www.automobile-catalog.com/car/2011/1337945/bmw_535d....