What do the R129 SL Roadster and the Pagani Zonda super car have in common? The engine! The M120 V12 was used in a limited run of 85 R129 SL73 AMG roadsters. With 7.3 Litres of displacement and 525 BHP, it was the most powerful engine ever put into a SL Roadster at the time.
The massive horsepower and 552 Ft. Lbs. of torque helped the SL73 AMG to accelerate from 0-60 MPH in an estimated 4.8 seconds. Additionally, the brakes and suspension were also given improved components. the The SL73 offered Ferrari levels of performance from a rather heavy Mercedes-Benz roadster.
To make the SL73 AMG, AMG would take a standard SL600, and tweak the engine and other related components to develop the truly special vehicle. The cost to transform your standard SL600 into a SL73 AMG was approximately $50,000 USD at that time.
A rare sight, the SL73 AMG represents the classic Mercedes-Benz style with enormous amounts of power and torque.