How much horsepower did the 1931 Ford Model A have?
The Model A’s engine produced 40 horsepower (gross) from its 201 cubic inch inline-four.
In this article we explore what that figure meant at the time, how Ford reached that output with the engine’s design, and how horsepower is interpreted for vintage cars versus modern measurements.
Engine specifications that define its power
Before listing the numbers, it’s helpful to note that horsepower figures from the period were typically published as gross horsepower, which did not deduct drivetrain losses or accessories. The Model A’s power rating is most commonly cited as 40 horsepower in Ford’s materials and period marketing.
- Displacement: 201 cubic inches (3.3 liters)
- Configuration: Inline-4, flathead (L-head) engine
- Horsepower: 40 gross horsepower
- Peak power RPM: commonly cited around 1,800–2,000 rpm
These specifications explain how the Model A delivered its characteristic power for daily driving in the early 1930s.
Historical context and driving experience
The 40 hp output powered a relatively lightweight car by modern standards, delivering practical performance for families and travelers of the era. Expect modest acceleration and a top speed in the low- to mid-60s mph under favorable conditions. The Model A is remembered for reliability, ease of maintenance, and a straightforward driving experience rather than high-speed performance.
Notes on horsepower ratings
Modern discussions distinguish between gross horsepower (the number originally published) and net horsepower (power at the crank after losses). Restorations and contemporary testing may yield slightly different figures, but the official historical rating for the 1931 Model A remains 40 gross horsepower.
Summary: The 1931 Ford Model A used a 3.3-liter inline-4 delivering 40 gross horsepower, a figure that defined its approachable, dependable performance in the late 1920s and early 1930s.
