The Morgan Motor Company announced that it would launch the 3 Wheeler in 2011 at the Geneva Motor Show. The 3 Wheeler was initially said to have a Harley-Davidson Screaming Eagle V-twin engine and a Mazda 5-speed manual transmission and was estimated to deliver 115 horsepower at the rear wheel. However, there was a surprise when the prototype that was shown at Geneva had an S&S engine. Production three-wheelers turned out to have S&S engines. The kerb weight was originally estimated to be less than 500 kilograms (1,102 lb), but the final weight was tested at 550 kg. The acceleration from zero to 60 miles per hour (97 km/h) was estimated by Morgan as 4.5 seconds, with an (estimated) top speed of 115 miles per hour (185 km/h).