ABT Audi AS5 (2008): Honest Driving Impressions & Full Review

I still remember the first time I rolled onto a rain-slicked mountain pass in the ABT Audi AS5 (2008). The sky was grey, the tarmac dark and shiny, and the moment I squeezed the throttle, something different happened—not just a rush of speed, but a composed, unflappable surge that felt tuned rather than transformed. This wasn't just an Audi A5 with badges; it was a car rebalanced from the chassis up.

When ABT unveiled the AS5 at the Essen Motor Show that same year, they took the already elegant A5/S5 and applied their own philosophy: more is not always better—better is better. What you get is a machine that walks a line few others manage so cleanly.

Before you walk into any showroom or browse listings, you deserve to know what this car actually delivers day to day, not just what the spec sheet claims.

What does the exterior design feel like up close?

Stand near one and the changes are subtle, but they matter. The front lip spoiler doesn't shout; it tightens the car's visual stance, pulling the nose closer to the road without looking overdone. Along the sides, the body kit flows with the A5's original curves rather than fighting them—cleaner, sharper, but still unmistakably an Audi.

At the rear, the quad exhaust tips are the most obvious signature, sitting neatly within a redesigned diffuser area. The suspension drops the car by roughly 25 millimeters on standard ABT springs, or up to 50 mm with the threaded sport suspension. It sits lower, fills the wheel arches more completely with 20-inch BR alloys, yet never looks like it's been slammed to the point of being unusable.

Is the interior comfortable for daily use?

Settle into the cabin and the foundation is pure Audi—solid, buttoned-down, built to standards many rivals still hadn't matched by 2008. ABT adds aluminum pedal covers, a revised shift knob, and embroidered or stitched accents that mark it out without overwhelming the space.

The front sport seats hold you firmly in corners but remain supportive on long drives. You sit low, visibility is decent ahead though the sloping roofline narrows the rear view—something you notice when parking. Rear-seat space is tight for adults; leg room is adequate for shorter trips but anyone over six feet will feel cramped. The trunk, however, is surprisingly generous, and the split-folding back seat expands that further when you need it.

Tech and features — what actually works?

From the donor A5/S5, you get heated leather seats, dual-zone climate control, and a steering wheel with buttons that feel damped and precise. Bluetooth and a Bose sound system are there on higher-spec cars, though the display screen is small by today's standards and the navigation graphics are dated.

ABT didn't reinvent the electronics, and that's fine—reliability matters more here. The driving modes adjust throttle response, steering weight, and (where fitted) adaptive damping. In Comfort, the car relaxes; in Dynamic, it sharpens noticeably. The transition between modes is tangible, not just a marketing label.

ABT Audi AS5 (2008) specs: How does it feel to drive?

The heart of the 2008 AS5 comes in two main flavours from ABT's factory. The 3.0 TDI version was boosted to 300 hp and 600 Nm of torque, delivering 0–100 km/h in 5.2 seconds and a top speed of 264 km/h. For the petrol-based S5 variant, ABT refined the 4.2-litre V8 beyond the standard 354 hp, with free-flowing exhaust, revised engine management, and careful breathing upgrades that unlock more top-end pull and a richer, deeper sound without harshness.

What figures don't capture is how it delivers that power. The quattro all-wheel drive system means grip is never in doubt. Turn-in is keener than a stock A5 thanks to firmer bushings, lower centre of gravity, and carefully recalibrated dampers. Push hard and understeer is still there at the limit—Audi DNA doesn't vanish—but it sets in later and is easier to manage than in the base car. The steering weights up progressively, though it remains slightly insulated compared to rear-wheel-drive rivals.

City streets vs highway — two different personalities

In town, the AS5 is surprisingly polite. The clutch on manual cars has a smooth, consistent take-up; the automatic shifts unobtrusively. The firmer suspension does transmit more road texture than a standard A5, especially over potholes or expansion joints, but it never becomes harsh or jittery. You notice the extra width in tight parking spots—this is not a narrow car.

On the open road is where it finds its voice. The V8 builds speed with relentless, velvety ease; the diesel variant serves up a tidal wave of low-end grunt that makes overtaking almost effortless without shifting down. Wind noise stays reasonable at cruising speed, and the car tracks straight and true, eating up distance like a machine designed for exactly that purpose. Merging onto highways feels secure—there's always enough power in reserve.

How confident and safe does it feel?

ABT upgraded the braking system with 380 mm discs up front, visible behind those 20-inch wheels. They bite progressively, hold up well under repeated hard use, and give you genuine reassurance that the extra power has matching stopping capability.

The quattro system means wet or dry, the AS5 maintains traction where rear-drive rivals would already be shuffling for grip. Electronic stability control can be relaxed but never fully defeated on road cars—something that keeps you aware of your limits. That slightly muted steering feedback? It also means the car stays calm when you hit a mid-corner bump—no sudden tugs at the wheel, just steady forward progress.

Trim levels — what each version adds

The AS5 came in a progression that built on the base Audi specification. The starting point was the aerodynamic package—front lip, side skirts, rear diffuser and quad exhaust—plus ABT springs lowering the car by 25 mm and 19-inch wheels. That gave you the look and a modest handling improvement.

The stepped versions added more: 20-inch wheels with wider tyres, the threaded adjustable suspension, uprated braking, engine control module remapping, and full interior treatment including custom leather, carbon or aluminium trim, and branded floor mats. At the top, the fully specified cars combined every mechanical upgrade—exhaust, engine, suspension, brakes, wheels—for the complete ABT experience. Importantly, you can spot factory versus aftermarket conversions by the build documentation; not every AS5 you see carries the full factory specification.

ABT AS5 vs BMW M3 E92 and Mercedes C63 AMG W204

Against the BMW M3, the AS5 feels more composed and less frenetic. The M3's naturally aspirated V8 screams and rewards high revs, its rear-drive chassis more playful on exit. The AS5 is quieter, more planted, faster to get power down in poor conditions, and easier to drive quickly without working hard. The M3 talks more through the steering wheel; the AS5 carries four people and their luggage with less drama.

The Mercedes C63 AMG is a different beast entirely—brutal, loud, explosively powerful, a hot rod disguised as a luxury coupe. It overwhelms its rear tyres, thumps over bumps, and demands patience in traffic. The AS5 is more refined, more cohesive, and genuinely better as an everyday car. If the C63 is a sledgehammer, the AS5 is a precision instrument—calmer, consistent, and never exhausting to live with.

Honest pros and cons

• Pros: Factory-engineered upgrades mean the AS5 retains Audi's structural integrity rather than feeling like a bolt-on conversion
• Pros: Quattro all-wheel drive delivers year-round confidence that neither the M3 nor C63 can match in rain or snow
• Pros: The V8 note is rich and deep without being intrusive—loud enough when you want it, quiet when you don't
• Cons: Steering feedback remains muted compared to rear-drive competitors; you never quite forget you're driving a heavy, front-biased car
• Cons: Running costs are substantial; fuel consumption, brake wear, and specialist maintenance all demand a serious budget

Final verdict — who is this car for?

The ABT AS5 (2008) is for the driver who wants something special without sacrificing livability. You don't need to compromise your commute to own it, nor do you need a second car for weekends. It is fast, capable, and handsome, but it wears its capability lightly—never shouting, never drawing unwanted attention.

If you value understated style, all-weather traction, and a car that feels built to last, this deserves your attention. But if you crave raw, unfiltered engagement—the kind of connection that makes every drive feel like an event—you should test the M3 alongside it. They're all great cars; they're just great in different ways. Which one fits you better?

Frequently Asked Questions

Is the 2008 ABT AS5 reliable as a daily driver?

Yes, provided maintenance has been kept up to date. Because ABT builds on the proven Audi A5/S5 platform, most mechanical parts are standard Audi, meaning parts availability is good. The ABT-specific components—engine management, exhaust, suspension—are generally robust when maintained by specialists. Always verify service records and check for signs of overheating or neglected timing chain tensioners on high-mileage examples.

What's the difference between an AS5 and a modified A5 with badges?

Genuine ABT factory cars come with build documentation and a coordinated, warranty-backed upgrade program. Many used cars on the market have been fitted with replica parts or piecemeal modifications—ask for the original ABT build sheet and check the chassis registry where possible. A genuine car will feel cohesive; a home-converted one often won't.

Can I still get parts and service today?

ABT still supports these models, and Audi dealers handle the base-vehicle maintenance. Wear items like brakes, suspension components, and exhaust sections are available through ABT branches or authorized distributors. Plan ahead—some specialized items may require ordering from Germany.