You cant compare a Petrol to a Diesel they both behave very differently. A diesel territory is a great idea imo. Power figures for the diesel may only be 140 kw but I bet they make up for it in torque which is why its such a great idea for a heavy vehicle, theres a reason they use diesels to pull 150tonne in road trains, even more in loco's and alot more than that in supertankers.