Horsepower vs engine size

The horse power/displacement question which began this thread has been discussed, ad nauseum, for as long as I can remember. I sometimes enjoy throwing my $.02 in. I have found some success in repairing and maintaining and operating vehicles for commercial and private use. In my efforts, I have acquired a great appreciation for those vehicles and power trains which have proven to be reliable and economical while fullfilling their purposes and grand claims in advertising have often been the poorest basis for picking a vehicle. But no, my Ford’s 4.9L and the Nissan engine would not make a happy swap for either vehicle.