Audi A4 2.0 TDI 170 S-Line: Complete Used-Car Review

The Audi A4 2.0 TDI 170 S-Line stands as a testament to German engineering, combining a potent diesel powertrain with the brand’s signature luxury and sporty flair. This model, part of the acclaimed B7 or B8 generation, delivers 170 horsepower from its turbocharged 2.0-liter engine, offering brisk acceleration and impressive fuel economy for its class. Ideal for long-distance commuters and enthusiasts alike, it balances refinement with dynamic handling, especially in Quattro variants.

Powertrain and Performance Breakdown

At the heart of the Audi A4 2.0 TDI 170 S-Line lies a 1,968cc four-cylinder turbo diesel engine producing 170 bhp at 4,200 rpm and 350 Nm of torque at lower revs, ensuring strong low-end pull. Paired with a six-speed manual transmission in most configurations, it achieves 0-62 mph in approximately 8.6 to 8.8 seconds, with a top speed around 134-137 mph. The engine’s common-rail injection and SOHC setup contribute to smooth power delivery, making it suitable for both urban driving and highway cruising.

Fuel efficiency is a highlight, with official figures showing 30 mpg urban, 52 mpg extra-urban, and combined economy in the high 30s to low 40s mpg, depending on conditions. CO2 emissions hover at 179 g/km, aligning with Euro 4 standards of its era. For those seeking enhanced grip, the Quattro all-wheel-drive system distributes power intelligently, improving traction on wet or slippery surfaces without sacrificing too much efficiency.

Dimensions and Practicality

Measuring 4,586 mm in length with a 2,642 mm wheelbase, the A4 offers generous interior space for five passengers. Luggage capacity reaches 442 liters with seats up, expanding significantly when folded, making it versatile for family use or business travel. The S-Line trim adds sportier aesthetics with 17-inch alloy wheels (235/45 R17 tires), lowered suspension, and aggressive body styling.

Turning circle of 11.1 meters aids maneuverability in tight spaces, while towing capacity hits 1,800 kg braked and 750 kg unbraked.

Driving Dynamics and Handling

The S-Line package sharpens the A4’s chassis with firmer suspension and precise steering, delivering confident cornering and minimal body roll. POV test drives reveal a composed ride, with the diesel engine’s torque providing effortless overtaking. Quattro models excel in all-weather conditions, though front-wheel-drive versions are lighter and nimble. Noise insulation is excellent, keeping cabin serenity even at motorway speeds.

• Acceleration: 0-62 mph in 8.6-8.8s for responsive daily driving.
• Top Speed: Limited to 134 mph, prioritizing safety and efficiency.
• Handling: S-Line tweaks ensure agile responses without harshness.
• Ride Comfort: Balanced for long journeys, absorbing bumps effectively.

Interior Quality and Technology

Step inside, and the A4 greets with premium materials: soft-touch plastics, supportive S-Line sport seats in leather/Alcantara, and an intuitive dashboard layout. The multifunction steering wheel and optional MMI infotainment system (with navigation) were advanced for the time. Ample headroom and legroom front and rear cater to taller occupants, while climate control and ample storage enhance usability.

Safety features include multiple airbags, ABS, stability control, and strong crash test ratings from Euro NCAP equivalents. Insurance grouping at 30E reflects its performance credentials.

Reliability and Ownership Experience

Audi’s 2.0 TDI 170 engine earns praise for durability, with forum users and technicians noting its robustness when maintained properly. Common issues like timing belts or DPF filters are manageable with routine servicing. Warranties cover 3 years/60,000 miles, with 12-year corrosion protection. Resale values hold firm due to the model’s reputation.

Remapping enthusiasts report gains to 175-200 bhp and higher torque, but stock tuning suffices for most. Annual costs remain reasonable, with diesel fuel savings offsetting premium servicing.

Comparisons with Rivals

The A4 edges out in interior refinement and Quattro optionality, though rivals match in performance.

Pros and Cons

• Pros: Potent yet efficient engine, premium cabin, strong build quality, versatile Quattro system.
• Cons: Dated emissions tech by modern standards, firm ride on poor roads, higher insurance group.

Who Should Buy This Model?

Perfect for executives needing a refined daily driver with towing capability and long-range efficiency. Budget buyers in the used market get luxury at accessible prices, especially post-warranty.

Frequently Asked Questions (FAQs)

Is the Audi A4 2.0 TDI 170 reliable?

Yes, the common-rail diesel is highly regarded for longevity with proper maintenance.

What’s the fuel economy like?

Expect 40+ mpg combined in real-world driving.

Does it have Quattro?

Available on select trims for superior all-weather grip.

How does remapping affect performance?

Stage 1 tunes boost to ~200 bhp safely.

What’s the towing capacity?

Up to 1,800 kg braked.

Market Verdict

The Audi A4 2.0 TDI 170 S-Line remains a compelling used buy, blending timeless design, engaging drive, and practicality. Its diesel torque and build quality ensure it ages gracefully.