The Audi PP is a 1,984 cc inline-four petrol engine produced between 1972 and 1978. It was developed during Audi's integration into the Volkswagen Group and used in several rear-wheel-drive models. The engine features a cast-iron block, overhead valve (OHV) configuration, and a single Solex 35 PDSI carburettor in standard form, delivering 90 PS (66 kW) and 155 Nm of torque.
Fitted primarily to the Audi 80 (B1) and Audi 100 (C1/C2), the PP engine was engineered for balanced performance and fuel economy in mid-size sedans. It met early European emissions standards through basic air injection and ignition timing control, achieving what would later be classified as pre-Euro compliance depending on model year and market (EU Directive 70/220/EEC).
One documented concern is premature camshaft and lifter wear under extended oil change intervals or with non-specified lubricants. This issue, referenced in Audi Service Information Bulletin 03.76.02, is attributed to inadequate oil film strength at the upper valvetrain under sustained load. Later production batches incorporated improved camshaft surface hardening to mitigate wear rates.
Production years 1972–1978 meet pre-Euro emissions standards; exact compliance varies by market and model year (EU Directive 70/220/EEC).
The Audi PP is a 1,984 cc inline-four OHV petrol engine engineered for compact and mid-size sedans (1972–1978). It combines robust cast-iron construction with single-carburettor aspiration to deliver linear power delivery and mechanical durability. Designed to meet early European emissions directives, it prioritises serviceability and long-term reliability over high specific output.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 1,984 cc | |
| Fuel type | Petrol | |
| Configuration | Inline-4, OHV, 8-valve | |
| Aspiration | Naturally aspirated | |
| Bore × stroke | 87.0 mm × 83.5 mm | |
| Power output | 90 PS (66 kW) | |
| Torque | 155 Nm @ 3,200 rpm | |
| Fuel system | Single Solex 35 PDSI carburettor | |
| Emissions standard | Pre-Euro (EU Directive 70/220/EEC) | |
| Compression ratio | 9.0:1 | |
| Cooling system | Water-cooled | |
| Turbocharger | Not applicable | |
| Timing system | Chain-driven camshaft | |
| Oil type | SAE 10W-40 mineral oil (API SD/CC) | |
| Dry weight | 142 kg |
The OHV design offers mechanical simplicity and ease of maintenance but requires periodic valve clearance checks to maintain performance. Use of correct SAE 10W-40 mineral oil meeting API SD specifications is critical to prevent camshaft and lifter wear, especially under sustained load. Carburettor tuning should be performed with factory specifications; incorrect jetting affects emissions and fuel economy. All service procedures must follow Audi TIS documentation to ensure longevity. Units with documented chain wear should have guides and tensioner inspected. High-compression variants (if present) require 98 RON fuel to prevent knocking.
Oil Specs: Requires API SD/CC mineral oil (Audi SIB 03.76.02). Synthetic oils not recommended due to seal compatibility.
Emissions: Pre-Euro certification applies to all models (EU Directive 70/220/EEC). No DPF or catalytic converter fitted.
Power Ratings: Measured under DIN 70020 standards. Output of 90 PS is standard; no high-output variant confirmed in documentation.
Audi Technical Information System (TIS): Docs A19840, SIB 03.76.02
European Commission Type Approval Database (Directive 70/220/EEC)
SAE International: DIN 70020 Engine Power Measurement Standard
The Audi PP was used across Audi's B1/C1/C2 platforms with longitudinal mounting. This engine received platform-specific adaptations—standard intake manifold in the Audi 80 LS and emissions-tuned calibration in base Audi 100 models—and from 1975, the facelifted Audi 80 adopted revised ignition components, creating interchange limits. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped horizontally on the front face of the cylinder block, near the timing cover (Audi TIS A19875). The 8th VIN digit indicates engine type ('P' for 2.0L OHV series). Pre-1975 models have a single Solex carburettor with a black air cleaner; post-1975 LS variants may feature updated ignition distributors. Critical differentiation from 1.8L KP: PP has a larger bore and longer stroke, resulting in a taller block deck and distinct oil pan. Service parts require model-year verification—carburettor kits and ignition components for pre- and post-facelift models are not interchangeable (Audi SIB 03.76.02).
The PP's primary reliability risk is camshaft and lifter wear, with elevated incidence in high-mileage or poorly maintained units. Internal Audi service reports from 1976 noted a significant number of engines requiring cam replacement before 100,000 km when non-specified oils were used, while DVSA historic failure data shows valve train noise as a common MOT advisory. Extended oil intervals and use of non-API SD oils increase wear, making correct lubrication and maintenance critical.
Analysis derived from Audi technical bulletins (1974-1978) and UK DVSA historic failure statistics (1975-1985). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about AUDI PP.
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