RB20DOHC

The RB20DOHC is an engine code used by Nissan for a specific inline-four cylinder gasoline engine. The "RB" designation refers to Nissan's RB engine family, known for its robust construction and performance potential. The "20" indicates the engine's displacement, which is 2.0 liters (1998 cc). The "DOHC" signifies its Double Overhead Camshaft configuration, meaning it has two camshafts operating the valves in each cylinder head, allowing for more precise valve timing and potentially higher performance compared to single overhead camshaft designs.

This engine was primarily produced from the late 1980s through the mid-1990s and found its way into a variety of Nissan and Infiniti vehicles. Notable applications include models like the Nissan Skyline (R32 and R33 generations) and the Nissan Silvia (S13 and S14 generations), often in naturally aspirated variants. While not as commonly associated with high-performance tuning as some of its turbocharged RB counterparts (like the RB26DETT), the RB20DOHC still offered a good balance of power and efficiency for its time. Its inline-four configuration contributed to a relatively compact and lightweight design, making it suitable for sporty applications. The engine typically featured electronic fuel injection and a cast-iron block with an aluminum cylinder head.