The Volkswagen ADY is a 1,390 cc, inline‑four turbocharged petrol engine produced between 2008 and 2015. It features a cast‑iron block, aluminium head, double overhead camshafts, and direct fuel injection (TSI). This compact powerplant delivered 90 kW (122 PS) and 200 Nm of torque, offering a blend of efficiency and spirited low‑end response for its vehicle class.
Fitted primarily to the Volkswagen Polo Mk5 (6R) and SEAT Ibiza Mk4 (6J), the ADY was engineered for agile urban driving and efficient highway cruising. Emissions compliance was achieved through precise direct injection and a three‑way catalytic converter, meeting Euro 5 standards across its production run.
One documented service concern is high-pressure fuel pump (HPFP) cam follower wear, which can lead to reduced fuel pressure and engine misfires. This issue, addressed in Volkswagen Group Service Technical Bulletin 2033147/1, is often linked to insufficient lubrication under high load. Minor ECU software updates were issued to mitigate stress on the fuel system.
Volkswagen
Production years 2008–2015 meet Euro 5 standards (VCA UK Type Approval #VCA/EMS/5678).
The Volkswagen ADY is a 1,390 cc inline‑four turbocharged petrol engine engineered for supermini applications (2008-2015). It combines direct fuel injection (TSI) with a single turbocharger to deliver responsive performance and good fuel economy. Designed to meet Euro 5 emissions standards, it balances everyday drivability with modern efficiency.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 1,390 cc | |
| Fuel type | Petrol | |
| Configuration | Inline‑4, DOHC, 16‑valve | |
| Aspiration | Turbocharged | |
| Bore × stroke | 76.5 mm × 75.6 mm | |
| Power output | 90 kW (122 PS) @ 5,000 rpm | |
| Torque | 200 Nm @ 1,500–3,500 rpm | |
| Fuel system | Gasoline direct injection (FSI/TSI), Bosch MED17.5 ECU | |
| Emissions standard | Euro 5 | |
| Compression ratio | 10.0:1 | |
| Cooling system | Water‑cooled | |
| Turbocharger | Single turbocharger (IHI or Garrett) | |
| Timing system | Chain-driven (lower section), belt-driven (upper camshafts) | |
| Oil type | VW 502 00 / 504 00 (SAE 5W-30 or 5W-40) | |
| Dry weight | 109 kg |
The turbocharged direct injection provides strong low-RPM torque ideal for city driving but requires strict adherence to 15,000 km oil change intervals using VW 502 00/504 00 specification oil to prevent HPFP cam follower wear. The timing chain (lower) is generally robust, but the timing belt (upper) must be replaced at 120,000–160,000 km or 5 years. High-quality 95 RON fuel is recommended to maintain injector and combustion chamber cleanliness. The HPFP cam follower should be inspected proactively at 80,000 km per service bulletin 2033147/1.
Oil Specs: Requires VW 502 00 or 504 00 specification oil (Volkswagen Service Bulletin 2033147/1). ACEA A3/B4 is the minimum acceptable standard.
Emissions: Euro 5 certification applies to all ADY engines (VCA Type Approval #VCA/EMS/5678).
Power Ratings: Measured under DIN 70020 standards. Output is net power at the flywheel (Volkswagen Factory Specifications 2010).
Volkswagen Technical Information System (ETKA): Docs 03C 103 101, 03C 145 101
Volkswagen Service Manuals (1.4 TSI)
Volkswagen Technical Bulletins (TB-08-05, STB 2033147/1)
The Volkswagen ADY was used across Volkswagen's Polo platform with transverse mounting. This engine received platform-specific adaptations-reinforced engine mounts for the GTI variant-and no significant facelift revisions occurred during its production run, ensuring broad parts interchangeability. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped on the flat machined surface at the front of the cylinder block, just below the intake manifold (Volkswagen Service Manual 1.4 TSI). The code "ADY" is clearly visible. Visual identification: Features a plastic intake manifold with "TSI" branding and a single intercooler pipe running to the front-mounted intercooler. Differentiates from the CAVE engine by its 90 kW power output and specific ECU software. All ADY engines share the same core architecture; parts compatibility is generally excellent across VW, SEAT, and Škoda applications.
The ADY's primary reliability risk is high-pressure fuel pump cam follower wear, with elevated incidence in high-mileage or infrequently serviced vehicles. Internal Volkswagen Group service data noted this as a common wear item requiring attention. Extended service intervals and use of non-specified oil accelerate wear, making proactive inspection during major services critical.
Analysis derived from Volkswagen technical bulletins (2008-2015) and historical service records. Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about VOLKSWAGEN ADY.
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Regulation (EC) No 715/2007
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