After testing of the final vehicle, the horsepower rating was lowered to 105.

Rolls has always been coy about its horsepower ratings, noting simply that power "is sufficient."

Each car though, have different horsepower ratings ranging from 240 hp to near 700 hp.

This has a lighter payload and a lower horsepower rating.

"It will get the mean population of the vehicles to the horsepower rating of 320," he said.

In some cases, such can add up to a change in horsepower ratings.

Two handed routers will have a horsepower rating of from 7/8hp to 3-1/4 hp.

Unchanged was the horsepower ratings for both base and L-82 engines.

And these two engines could have the same horsepower rating even though one has 10 times more displacement than the other.

They conclude they could not compete with gas cars under a 1,000 horsepower rating.