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In 1933, Reid Railton strapped a plane engine to the most rudimentary chassis he could, and the Napier-Railton was born.
This missile on wheels broke all kinds of records in the few years after that, most notably the all-time lap record at the Brooklands oval in England, which it held until the oval was repurposed for military use at the onset of World War II.
The Napier-Railton gets its name from its creator, Reid Railton, as well as its engine, a 24-liter W12 Napier airplane engine, the most powerful engine available at the time it was built. It’s a truly one-of-its-kind vehicle.
— Official description [1]

The 1933 Napier Napier-Railton is a vintage racer by Napier that is featured in Forza Horizon 4 since the Update 20 patch.


The Napier-Railton is an aircraft engine powered race car known for breaking world speed records, most notably on the historic Brooklands race track, where it ran 143 mph (230 km/h).


The 24 liter Napier Lion engine uses twelve cylinders on three banks aligned in a W layout, hence creating the W12 configuration and using a triple exhaust system. This layout gave it shorter dimensions than contemporary V12 aircraft engines.

Boasting 564 hp (421 kW) and an imposing torque output of 1249 ft·lb (1693 N·m), the Napier-Railton is the most powerful pre-war car in the Forza series. Its engine is mated to a three-speed non-synchronous transmission.


The Napier-Railton has a riveted bare aluminum body similar to aircrafts. It uses leaf springs on both axles, with the rear notably using two sets of cantilever leaf springs on each wheel. As the front is not fitted with brakes, the car solely brakes with 16 inch rear drum brakes.[2]

Weighing 4518 lb (2049 kg), the Napier-Railton is one of the heaviest pre-war cars in the Forza series.


Icon ForzaHorizon4 Wide.png
Speed 7.1
Handling 5.1
Acceleration 5.3
Launch 6.8
Braking 5.6
B 628
Unlock Requirements
A "Hard-to-Find" vehicle that can not be purchased from the Autoshow
Auction House:
Can be purchased or bid on through an Auction House listing
This vehicle may appear as a listed item in the Forzathon Shop or as a Festival Playlist reward.
Forzathon Shop:
Series 23 (Winter) for 450 FP
Festival Playlist:
Series 20 (Autumn) - "Cult Courier" championship
Series 26 (Autumn) - "An Old Hand" championship
Series 29 (Spring) - "Dry Aged" The Trial
Performance & Car Type
Car Type:
Vintage Racers
Value: 1,000,000 CR
Top Speed: missing data
0-60 mph (0-97 km/h): missing data
0-100 mph (0-161 km/h): missing data
60-0 mph (97-0 km/h): missing data
100-0 mph (161-0 km/h): missing data
Lateral Gs:
60 mph (97 km/h): missing data
120 mph (193 km/h): missing data


Icon Drivetrain.png Conversion - Drivetrain
Icon Game ForzaHorizon4.png AWD Drivetrain



  • This car has the biggest engine displacement out of any car featured in the series, overall, and out of all naturally aspirated cars, at 24 liters.


  1. "Forza Horizon 4 | Series 20 Update" . forzamotorsport.net . Retrieved 03-12-2020.
  2. "Cobb Napier-Railton Endurance Racer" . oldmachinepress.com . Retrieved 03-13-2020.
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