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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 ...
These modifications include: "TwinPhaser" variable valve timing (cam-phasing on both inlet and exhaust cams, thus the name), gasoline direct injection and a higher compression ratio of 11.25:1. It also operates with a lean burn system up to about 1500 rpm, [ 4 ] as on many other engines from the company and is capable of generating 191 kW (260 ...
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 ...
Mechanical variable valve timing was introduced in the Alfa ... The first road car to bear the quadrifoglio was the 1963 Alfa Romeo Giulia TI Super, a variant of the ...
The Alfa Romeo Modular Inlet Manifold is a variable intake system fitted to the later CF2 1.8 and 2.0 litre Twin Spark engines. [citation needed] It operates by switching between two separate air intake runners of different lengths (one pair for each cylinder) to either shorten or lengthen the path from the end of the intake runner (within the plenum) to the inlet valves.
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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 ...