1908 National Model K

National built cars from 1900 to 1924 in Indianapolis, originally powered by electric motors. Electricity was phased out as a power source in 1906 when Arthur C. Newby became the company president. Newby was one of the four founders of the Indianapolis Motor Speedway where National won the 500-mile race in 1912 at an average speed of 78.72 mph. National still holds the record as the largest engine to ever win the Indy 500 with a four-cylinder engine that displaced 490 cubic inches!

1908 was the first year of the development of National's 40 horsepower 460 cubic-inch engine that evolved to nearly 80 horsepower 500 cubic inches in the cars which went on to win at Indianapolis. Unique to this car's engine is the cylinders are individually cast as opposed to the later and more common practice of casting in pairs. This is the only known car to have this engine configuration.