The Alfa Romeo 2000cc engine, also known as the Alfa Romeo Twin Cam, is a legendary powerplant that has been used in various Alfa Romeo models from the 1950s to the 1990s. “Unblocked” likely refers to a modified or tuned version of this engine, which has been optimized for increased performance.

· Displacement: 1,962cc (2.0 liters)

· Configuration: Inline-4 cylinder

· Valves: Dual overhead camshafts (DOHC) with 8 valves

· Power output:

    – Standard: 130-150 HP (96-110 kW)

    – Tuned/unblocked: 170-200 HP (125-147 kW) or more

· Torque output:

    – Standard: 140-160 Nm (103-118 lb-ft)

    – Tuned/unblocked: 180-220 Nm (133-162 lb-ft) or more

· Increased compression ratio

· Improved camshaft profiles

· Upgraded carburetors or fuel injection system

· Free-flowing exhaust system

· Lightened flywheel and crankshaft

These modifications aim to increase power output, improve throttle response, and enhance overall engine performance. However, it’s essential to note that such modifications may affect the engine’s reliability, fuel efficiency, and emissions.