Charge of the Model T's (1977)

Comedy - During WWI, the Germans try to encourage certain Mexican guerrillas to make trouble on the Texas border. Masterminding the plot is a German spy who has, at his disposal, the RX4... a specially equipped weapon-bearing automobile of awesome speed. But a U.S. Army lieutenant carries the day with his own fleet of Model T racers. - John David Carson, Carol Bagdasarian, Louis Nye