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The Alfa Romeo Twin Spark engine, introduced in the 1987 Alfa Romeo 75, also uses variable valve timing. [3] [4] The Alfa system varies the phase (not the duration) of the cam timing and operates on the inlet camshaft. [5] Alfa Romeo's variator is a cylindrical chamber that contains a pressure chamber and piston along with helical splines.
Alfa Romeo was the first manufacturer to use a variable valve timing system in production cars (US Patent 4,231,330). [10] The fuel injected models of the 1980 Alfa Romeo Spider 2000 had a mechanical VVT system. The system was engineered by Ing Giampaolo Garcea in the 1970s. [11] All Alfa Romeo Spider models from 1983 onward used electronic VVT ...
The system allows optimum timing of intake valve operation. MultiAir technology can increase power (up to 10%) and torque (up to 15%), as well as reduce consumption levels (up to 10%) and emissions of CO 2 (up to 10%), particulates (up to 40%) and NOx (up to 60%) [ 3 ] [ 7 ] when compared to a traditional petrol engine.
It can be transcluded on pages by placing {{Alfa Romeo}} below the standard article appendices. Initial visibility This template's initial visibility currently defaults to autocollapse , meaning that if there is another collapsible item on the page (a navbox, sidebar , or table with the collapsible attribute ), it is hidden apart from its title ...
The Alfa Romeo Twin Cam engine is an all-alloy inline-four engine series produced by Alfa Romeo from 1954 to 1994. In Italian it is known as the "bialbero" ("twin-shaft"), and has also been nicknamed the "Nord" (North) engine in reference to its being built in Portello, Milan (later Arese, close to Milan), in the North of Italy and to distinguish it from the Alfa Romeo Boxer engine built in ...
2.0L V6 12V Turbo from Alfa Romeo 166. The Alfa Romeo V6 engine (also called the Busso V6) is a 60° V6 engine made by Alfa Romeo from 1979 to 2005. It was developed in the early 1970s by Giuseppe Busso, and first used on the Alfa 6 with a displacement of 2.5 L (2,492 cc) and a SOHC 12-valve cylinder head.
With fuel injection and variable valve timing, this engine produced 148 PS (109 kW; 146 hp). This was an early example of a production engine using variable valve timing, though the first to do so was Alfa Romeo's own Spider in 1980. In North America, where the car was known as the Milano, only the 2.5 and 3.0-litre V6 engines were available ...
Other sources [8] declare that the 90° V6 engine in 1996 Alfa Romeo 155 V6 Ti is based on a 2.6 L V8 from 1970 Alfa Romeo Montreal with two cylinders removed, as allowed by the rules, however the FIA homologation documentation shows the homologated production engine was a "2850cm³" capacity "V6" engine. The bore spacing of the Montreal engine ...