page_title: Alfa Romeo V6 engine
section_title: 2.5 24V
hierarchical_section_title: Alfa Romeo V6 engine / 24V, four valve / 2.5 24V
caption_attribution_description: Alfa Romeo 156 2.5 V6 24V engine
context_page_description: The Alfa Romeo V6 engine was a 60° V6 engine made by Alfa Romeo from 1979 to 2005. It was developed in the early 1970s by Giuseppe Busso, and used on the Alfa 6 with a displacement of 2.5 L and a SOHC 12-valve cylinder head. Later versions ranged from 1,997 to 3,195 cc and had DOHC 24-valve valvetrains. The original design had short pushrods for the exhaust valves in a design similar to earlier Lancia Fulvia engines. The first DOHC version was in the 1993 Alfa Romeo 164, with an aluminium alloy engine block and head with sodium filled exhaust valves.
  The Alfa Romeo V6 has been used in kit cars like the Ultima GTR, Hawk HF Series, and DAX, as well as the Gillet Vertigo sports car. In August 2011 EVO magazine wrote that "the original Alfa Romeo V6 was the most glorious-sounding six-cylinder road engine ever," while the British Classic & Sports Car magazine described it as "the best sounding engine this side of a Maserati V8." The Alfa Romeo V6 engine has also been used in ice resurfacer made by engo Ltd. in Italy.
context_section_description: A four-valve version was introduced in 1997 with the Alfa Romeo 156. The engine now produced 190 PS (140 kW; 187 hp). In 2001, the V6 was uprated to 192 PS (141 kW; 189 hp). The 166 used a slightly detuned version to make more low rev torque. This engine version was awarded as the International Engine of the Year in 2000. The engine has a bore and stroke of 88 mm × 68.3 mm (3.46 in × 2.69 in), the same as the two-valve.
  Applications:
  1996–2005 Alfa Romeo 156
  1996–2007 Alfa Romeo 166
caption: 24V 2.5L from an Alfa Romeo 156
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