0-60 times are largely defined by the weight and the total frontal area of a vehicle. Given a fixed frontal area and largely similar mass the amount of power has to be exponential to improve the acceleration to a given speed.
Therefore the minimal improvement in engine power is unlikely to make a significant difference to the 0-60 time.
One other slight complicatoin in all this is the Gearbox/Final drive.... ie. it's torque/power applied at the road which counts... so for identical gearbox/diff ratio combinations the above is true - alternatively through a trick of maths - changing the gearbox or final drive ratio's you can also achieve better 0-60 times given a fixed amount of engine torque/power.
One characteristic of Morgans is that they use off the shelf gearboxes - which tend to be geared for larger saloon's. The Aero with all that Torque has a pretty useless 1st gear and it goes off the boil too quickly between shifts - there are a few people on here who have puts them up against similarly powered/weighted machinery and have struggled to keep up due to this.
To a driver this can be felt as a "lively" driving experience as opposed to one which is either "muted", "runs out of puff" or just "hard work".
You may only need to change one of the characteristics above and a car can really come alive.
