The N180B is a racecar which was constructed and entered by Ensign into the 1981 and 1982 seasons of F1. It was driven by Marc Surer, Ricardo Londono, Eliseo Salazar and Roberto Guerrero.

The car had a 3000cc Ford Cosworth DFV V8 engine and had a Hewland FGA 400 five-speed manual gearbox. The car had an aluminium monocoque chassis and rode on tyres made by Avon and Michelin.

The car debuted at the 1981 USA West GP where it was retired due to electronic failure. The car entered it's last race in the 1982 South Africa GP where it did not qualify.