#TBT: The ARVW, the most aerodynamic Volkswagen ever built
May 7, 2020
Aerodynamics play a key role in every modern vehicle. The less drag a vehicle generates when moving through the air, the less energy it consumes and the more quietly it moves.
Over the years, automakers have experimented with extreme vehicle shapes to demonstrate the innate relationship between drag and power. Few have been more radical than the Aerodynamic Research Volkswagen of 1980, a single-seat arrow that remains the most aerodynamic vehicle ever built with a VW badge.
Sparked by the oil crises of the 1970s, the ARVW was meant to demonstrate how aerodynamics and lightweight vehicle construction could generate massive speeds from everyday power. The first challenge was squeezing a driver, powertrain and four wheels into a body that could have the smallest profile possible. At just 33 inches tall and 43.3 inches wide, the ARVW’s shape was maximized at every turn for aerodynamic smoothness, from its hidden wheels and smooth underbody to moveable fins that helped keep it stable at high speeds.
The ARVW was built from an aluminum frame under a fiberglass-and-carbon body. Power came from a 2.4-liter, turbocharged, inline-six engine, which produced 177 hp, set right behind the driver and powering the rear wheels via a chain drive. By using an onboard water tank that injected water into the turbocharger’s intake, the engine needed few cooling vents, and the main cooling vent was positioned in the nose to let air flow smoothly over its radiator and exit on top of the vehicle.
The results were a vehicle with a coefficient of drag of 0.15, a number that remains far sleeker than any production vehicle. In October 1980, a small team of Volkswagen engineers and a top-tier open-wheel racing driver went to the Nardo test track in Italy to demonstrate what the ARVW was capable of. In the first hour, the ARVW hit 221 mph. It eventually topped out at 225 mph, setting two world speed records in the process.
The shape of the ARVW would later find an echo in the radical European-only XL1. And as low drag coefficients provide sizable benefits to an electric vehicle’s range, advanced aerodynamics will play an essential role in the upcoming ID. electric vehicle family.