Motorsport supremo Max Mosley believes the changes made to Formula One will make the sport more competitive.
Mosley's changes sought to widen the list of potential race winners
New aerodynamic and tyre regulations come into force next season, with engine capacity reductions in 2006.
"The reason for the changes is we need to reduce performance," said Mosley, the president of motorsport's world governing body.
He claimed Jaguar would not be quitting the sport had smaller engines been introduced earlier.
The move to reduce engine capacity has caused controversy but Mosley insists it will help stabilise the sport.
He said: "When there was a vote in the technical working group seven teams were in
favour and three voted against which means that at that time there were four
manufacturers in favour and three against.
"It absolutely doesn't make the manufacturers go away.
"It means the difference between a 200m euro research budget and a
commercially-built engine will be a few percent.
"If we brought these regulations in two years ago we'd probably still have
the Ford Motor Company."
Mosley added that he did not believe teams would fall by the wayside as a result of the new requirements they need to adhere to.
"I'd be very surprised because manufacturers are in it basically
because they get more out than it costs them," he said.
"The danger of losing manufacturers because they are not getting enough in
relation to the expenditure is greater than losing them because they are asked
to make a smaller engine."