The Lamborghini Marzal's inline-six was a split-in-half version of which engine?

The Lamborghini Marzal’s inline-six was a split-in-half version of the Lamborghini V12.

The Marzal was a one-off concept unveiled at the 1967 Geneva Motor Show. Designed by Marcello Gandini for Bertone, it was intended to explore a practical, genuine four-seat Lamborghini rather than a cramped 2+2. Its unusual engine layout helped make that packaging possible.

The 2.0-liter inline-six was created by dividing Lamborghini’s 4.0-liter V12 design in half. It produced a claimed 175 bhp at 6,800 rpm and used three Weber 40 DCOE carburetors. Mounted transversely behind the rear axle, the engine drove through a five-speed transaxle.

A common mix-up is to treat the Marzal six-cylinder as an unrelated Alfa Romeo or Ferrari engine. It was instead directly derived from Lamborghini’s own V12 family. Although the Marzal never entered production, its styling and four-seat concept strongly influenced the production Lamborghini Espada.