The Type 18, also called the Garros, is an automobile produced from 1912 through 1914. Produced shortly after the start of the company, the design was something of a relic.
It had much in common with the cars Ettore Bugatti had designed for Deutz Gasmotoren Fabrik but with the radiator of the Type 13.
Only 6 or 7 examples were built.
Power came from a large 5.0 L (5027 cc/306 in³) straight-4 engine with 3 valves per cylinder and a single overhead camshaft.
This large engine had a 100 mm bore and very long 160 mm stroke, developing 100 bhp at a relatively high 2800 rpm, the new engine was installed in a simple ladder frame chassis. Similar in design to Bugatti's Deutz chassis.
It used twin semi-elliptic leaf springs at the front and Buagtti's trademark reversed quarter-elliptic springs at the rear.
The rear wheels were driven by chains. This was common practice for large engined cars at the time. However the five litre Grand Prix car would go into history as the only chain driven Bugatti.
It is believed that the engine was dubbed the Bugatti Type 16 while the completed cars were labeled Type 18.