Audi ABK Specifications
| Engine Model: Audi ABK |
| Engine Type: 4-cycle inline 4-cylinder SOHC 8-valve liquid-cooled gasoline |
| Total Displacement: 121.1 cu.in (1.98 L) |
| Rated Engine Power: 115 Hp (85 kW) at 5400 rpm |
| Fuel System Type: Multi-point fuel injection (MPFI) |
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The Audi ABK is a 2.0-liter, four-cylinder,
naturally aspirated gasoline engine. This powerplant is a member of
Audi's 2.0 8V engine family, derived from the Volkswagen ABA block. It
is a simple, robust, and reliable engine designed for durable service in
Audi's entry-level and mid-range models of the 1990s. Featuring a single
overhead camshaft (SOHC) and 8-valve architecture with multi-port fuel
injection, the ABK prioritizes torque production, mechanical simplicity,
and ease of maintenance over high-revving performance.
Its non-interference design and cast-iron block contribute to
exceptional longevity and forgiveness of minor maintenance lapses. The
engine delivers adequate power for daily driving with a characteristic
flat torque curve. While lacking the sophistication of contemporary
multi-valve engines, the ABK's reputation for rugged dependability and
low running costs has secured its place as a respected workhorse in the
Audi lineage.
Engine Type: Inline-4 cylinder, liquid-cooled, naturally aspirated,
multi-point fuel injection (MPFI).
Displacement: 1984 cc (1.984 L) / 121.1 cu.in.
Bore x Stroke: 82.5 mm x 92.8 mm / 3.25 in x 3.65 in.
Compression Ratio: 10.0:1.
Firing Order: 1-3-4-2.
Direction of Rotation: Clockwise (viewed from the front/flywheel end).
Maximum Power Output: 85 kW (115 hp) at 5400 rpm.
Maximum Torque Output: 168 Nm (124 lb-ft) at 3200 rpm.
Fuel Requirement: Unleaded gasoline, 91 RON (87 AKI).
Emission Standards Compliance: Euro 2 / OBD I.
Material: Cast iron. This material selection ensures dimensional
stability and high durability.
Construction: Deep-skirt design with an integrated upper crankcase. The
block has five main bearing supports. The main bearing caps are not
cross-bolted, reflecting the engine's straightforward design philosophy.
Crankshaft: Cast nodular iron crankshaft, supported by five main
bearings. Main bearing journal diameter: 54.0 mm / 2.126 in. Crankpin
journal diameter: 47.8 mm / 1.882 in.
Pistons: Aluminum alloy pistons with a dished crown. Each piston uses
two compression rings and one oil control ring. Connecting Rods: Forged
steel I-beam connecting rods.
Material: Aluminum alloy.
Head Construction: Single overhead camshaft (SOHC), 8-valve design (2
valves per cylinder). The camshaft is driven by a reinforced fiberglass
timing belt.
Valve Arrangement: Inline valves actuated directly by the camshaft lobes
via bucket tappets with integrated hydraulic lash adjusters. This system
eliminates the need for manual valve clearance adjustment. The ABK is a
non-interference engine. Variable Valve Timing: None.
Valve Diameters: Intake: 39.5 mm / 1.555 in. Exhaust: 34.0 mm / 1.339
in.
Injection Type: Multi-port fuel injection (MPFI).
Engine Management: Bosch Motronic M2.3 or a variant thereof. This system
integrates fuel injection and ignition timing control.
Fuel Delivery: An electric in-tank fuel pump supplies constant pressure
to the fuel distribution rail.
Fuel Rail and Injectors: Four individual solenoid-operated fuel
injectors, one for each cylinder.
Throttle Body: Single-bore, cable-operated throttle body. An idle air
control valve regulates idle speed.
Air Intake: Naturally aspirated via an air filter housing and a plastic
intake manifold.
Type: Pressure-fed, full-flow filtration with a gear-type oil pump.
Oil Pump: Gear-type pump, driven by the crankshaft.
Oil Filter: Spin-on canister type, mounted vertically on the engine
block.
Oil Cooler: Not installed on this engine.
Oil Capacity (including filter): 4.0 L / 4.2 US qt.
Recommended Oil Grade: Engine oil meeting VW specification 501 01 or API
SH/SJ. Viscosity: 10W-40 or 5W-40. Operating Oil Pressure: 2.0 bar at
hot idle, 4.0 bar at 2000 rpm. Imperial: 29 psi (idle), 58 psi (2000
rpm).
Type: Pressurized, single-circuit system.
Water Pump: Centrifugal pump, driven by the timing belt. Its replacement
is part of the timing belt service procedure. Thermostat: Wax pellet
type, opening temperature 87°C (189°F).
Coolant Capacity: 6.5 L / 6.9 US qt (entire system).
Coolant Type: VW G11 (blue) or G12 (pink) ethylene glycol-based
antifreeze.
Electrical System: 12-volt negative ground.
Ignition System: Distributor-based ignition with a single ignition coil.
The Bosch Motronic ECU controls ignition timing. Engine Management:
Bosch Motronic M2.3 as stated. The system utilizes a hot-wire mass air
flow (MAF) sensor. Crankcase Ventilation: A closed Positive Crankcase
Ventilation (PCV) system.
Overall Length: 570 mm / 22.4 in.
Overall Width: 630 mm / 24.8 in.
Overall Height: 640 mm / 25.2 in.
Dry Weight: 128 kg / 282 lbs.
Engine Oil Change Interval: 15,000 km or 12 months under normal service.
Severe service intervals are 7,500 km or 6 months. Imperial: 9,300 miles
/ 4,700 miles.
Oil Filter Change: Every oil change. Fuel Filter Change: 60,000 km
(37,300 miles). Air Filter Change: 60,000 km or as inspected. Timing
Belt Replacement: Critical for engine operation.
The ABK is a non-interference engine, so belt failure will not cause
internal damage. Replace the timing belt, tensioner, and water pump
every 90,000 km (56,000 miles) or 5 years. Spark Plug Replacement:
Standard copper-core spark plugs require replacement every 30,000 km
(18,600 miles). Coolant Replacement: Every 2 years. Valve Adjustment:
Not required. Hydraulic lifters maintain clearance automatically.
Cylinder Head Bolts: Torque-to-yield (TTY) bolts. Tighten in the
specified sequence: First pass to 40 Nm (30 lb-ft). Final pass: tighten
an additional 180 deg (1/2 turn). These bolts are not reusable.
Main Bearing Cap Bolts: 80 Nm (59 lb-ft).
Connecting Rod Cap Bolts: 50 Nm (37 lb-ft) + 90° turn (replace bolts).
Spark Plugs: 25 Nm (18 lb-ft).
Oil Drain Plug: 30 Nm (22 lb-ft).
Camshaft Sprocket Bolt: 90 Nm (66 lb-ft).
Flywheel to Crankshaft Bolts: 100 Nm (74 lb-ft).
Wheel Bolts: 120 Nm (89 lb-ft).
The Audi ABK 2.0 8V engine was utilized in several Audi models
throughout the 1990s, primarily as a base or mid-range powerplant.
Audi 80 (B4, 1991-1995): 80 2.0 E, 80 2.0.
Audi 90 (B4, 1991-1994): 90 2.0 E.
Audi Coupe (B4, 1991-1995): Coupe 2.0 E.
Audi Cabriolet (8G, 1994-1998): Cabriolet 2.0 E.
Audi A4 (B5, 1994-1997): Early A4 2.0 models in certain markets before
the introduction of the 1.8T.
Volkswagen Passat (B3/B4): Shared this engine family, though often with
different engine codes (e.g., 2E, ABA).
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