Two current non-multivalve performance engines: Chevy LS1 and the Viper V10.
As for less-powerful cars (vehicles) beating more powerful cars in acceleration...power to weight ratio is very important. An extreme case would be any sport bike vs. a Corvette.
As for less-powerful cars (vehicles) beating more powerful cars in acceleration...power to weight ratio is very important. An extreme case would be any sport bike vs. a Corvette.