924 (1976-1988)

Technical data

Manufactured by Porsche in Neckarsulm, Germany, from 1976 to 1988, the Porsche 924 stands as the pioneer among Porsche's production vehicles, being the first to incorporate water cooling and adopt a front-engine, rear-wheel-drive layout.. The original design featured an Audi-sourced four-speed manual transmission, repurposed from a front-wheel-drive car and adapted as a rear transaxle, paired with VW's EA831 2.0 L I4 engine, also utilized in the Audi 100 and Volkswagen LT van. Equipped with Bosch K-Jetronic fuel injection, the North American version of the 924 initially produced 95 horsepower (71 kW), later boosted to 110 horsepower (82 kW) in mid-1977 with the introduction of a catalytic converter. European models, free from emissions constraints, boasted 123 hp (92 kW) and featured visual distinctions from their US counterparts. In 1978, Porsche introduced a turbocharged version of the 924. To power the 924 Turbo, Porsche conducted extensive revisions on the VW EA831 2.0 L I4 engine, already utilized in the naturally aspirated 924, opting for hand assembly at the Porsche factory in Zuffenhausen, Stuttgart. Engineers redesigned key components, including the crankcase, connecting rods, cylinder-head gasket, crankshaft, and introduced a new aluminum-silicon alloy cylinder head. With adjustments such as dished combustion chambers and specially shaped pistons, the compression ratio was lowered to 7.5:1, effectively accommodating the KK&K K-26 turbocharger without risk of pre-ignition. Platinum-tipped spark plugs were incorporated, and the exhaust valve diameter increased over the naturally aspirated engine. With a boost pressure of 10 psi (69 kPa), the output surged to 170 hp (127 kW) at 5,500 rpm and 181 lb⋅ft (245 N⋅m) of torque at 3,500 rpm. In the 1981 model year, Porsche launched an updated version of the 924 Turbo, known as the Series 2 (despite retaining the "924 turbo" badging). This iteration featured enhancements such as a redesigned turbocharger with a larger compressor and a smaller turbine, operating at higher boost levels. Alongside a slight increase in compression to 8:1, improvements in the fuel injection system, including DITC (Digital Ignition Timing Control) ignition triggered by the flywheel, resulted in a peak power output of 177 hp (132 kW). By 1984, with VW discontinuing the engine blocks for the 2.0 L 924, Porsche faced a challenge. To maintain an entry-level option, Porsche adapted the 944's 2.5-liter engine for the 924, resulting in the 1986 924S. This model featured upgraded suspension, brakes, and a power output of 148 hp (110 kW). In its final year of production in 1988, the 924S saw a power increase to 158 PS (116 kW; 156 hp) through piston modifications raising the compression ratio to 10.2:1, matching the base model 944's power output.

Porsche 924 spare parts

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