The Model M was equipped with a side-valve, in-line 336 cu in (5,506 cc) four-cylinder engine developing 36 bhp. The engine was installed in the front, driving the rear wheels through a transmission shaft. The gearbox had three forward gears, with the gearshift lever positioned to the right of the driver.[2] The limousine body style was replaced with the touring sedan which was more popular, while the retail price remained at US$2,750 ($89,925 in 2023 dollars [3]) It was entered in the Glidden Reliability Tour and won the competition.[2]
The brake pedal engaged drum brakes on the rear wheels. The Model M had a wheelbase of 112 in (2,845 mm) and was offered as a five-passenger touring car or 4-door sedan. The previously offered 2-door Model H Flying Roadster was now given its own designation called the Model MR.[2]
1,000 Model M were manufactured in 1908. It was replaced by the Model D in 1909; the roadster derivative was called the Model DR.