1.05 R4 33-37kW[edit]
identification
parts code prefix: 030, engine ID codes: GL, HZ, AAK, AAU, ACM, AEV
engine displacement & engine configuration
1,043 cubic centimetres (63.6 cu in) inline-four engine (R4/I4); bore: 75.0 mm (2.95 in), stroke: 59.0 mm (2.32 in), stroke ratio: 1.27:1 - oversquare/short-stroke, 260.7 cc per cylinder
cylinder block & crankcase
grey cast iron; five main bearings, die-forged steel crankshaft
cylinder head & valvetrain
cast aluminium alloy; two valves per cylinder, 8 valves total, two concentric valve springs per valve, bucket tappets, belt-driven forged or cast steel single overhead camshaft (SOHC)
fuel system & engine management
Pierburg 1B3 or Weber 32 TLA/32 TL carburettor, later with throttle body-sited electronic single-point fuel injection (SPI) and Bosch Mono-Jetronic or Mono-Motronic engine control unit
DIN-rated motive power & torque outputs - carburettor
29 kilowatts (39 PS; 39 bhp) — GL
33 kilowatts (45 PS; 44 bhp) @ 5,600rpm — ACM
37 kilowatts (50 PS; 50 bhp) — HZ
DIN-rated motive power * torque outputs - SPI
33 kilowatts (45 PS; 44 bhp) @ 5,200 rpm; 76 newton metres (56 lbf·ft) @ 2,800 rpm — AAK, AAU, ACM, AEV
applications
Volkswagen Polo (GL: 08/81-10/86, HZ: 08/85-01/92, AAK: 01/90-07/90, AAU: 10/90-07/94, ACM: 02/92-12/92, AEV: 10/94-06/96), Volkswagen Derby (GL: 10/81-11/84), Volkswagen Golf (HZ: 05/85-10/91), Volkswagen Jetta (HZ: 08/86-10/91, AAK: 01/90-07/90), SEAT Ibiza Mk2 (02/93-06/96), VEB Sachsenring Trabant (1989-1991)
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