What does the LP abbreviation in Lamborghini Countach model names mean?

The LP abbreviation in Lamborghini Countach model names means “Longitudinale Posteriore,” Italian for “longitudinal rear.” It describes the car’s longitudinally mounted engine positioned behind the passenger compartment in a rear-mid-engine layout.

Lamborghini adopted the designation system to identify both engine arrangement and approximate displacement. Thus, the original production Countach was the LP400: “LP” described the layout, while “400” referred broadly to its 4.0-litre-class engine. The prototype shown at the 1971 Geneva Motor Show was called the LP500.

The Countach’s layout differed from the Lamborghini Miura’s transverse engine arrangement. Its V12 was mounted longitudinally, while the transmission sat between the seats and connected to the rear differential through a driveshaft running through the engine’s oil sump. That unusual engineering helped improve weight distribution while preserving the dramatic wedge-shaped design.

A common mix-up is treating LP as an English abbreviation or as a direct horsepower figure. It is an Italian layout description, and the number following it generally indicates nominal engine displacement rather than output.