I will dig out the torque curves...they are on the next page. I think the difference is that in the car, you dont use the extra power for long. But in the bus you will be tending to sit at full tilt for miles getting up long hills, so the cylinder heads get hot. Bumping the CR up does that.
Yes, but the engines are very similar and will have similar efficiency, the AN slightly better due to higher CR and 98 RON fuel. The torque curve will be steeper for the AN, to develop higher BHP, but at low revs the torque is probably less than the AT. Torque is very closely linked to engine capacity and you can't have more power (BHP) without having more revs or more torque. BHP = (torque x rpm)/5252
I agree. Peak torque for the AN at the same revs as the AT is a rather strange. The AP makes more since.
