Mercedes-AMG — from race shop to a division that designs cars from scratch

The three letters on the grille once stood for specific people: Hans-Werner Aufrecht and Erhard Melcher, engineers who left Daimler-Benz to build race engines outside the corporate framework. Today AMG is a wholly owned division of Mercedes-Benz Group, one that designs cars from a blank sheet, not just hops up someone else’s. Between those two states lie almost sixty years, a couple of changes of ownership, and a badge on the boot lid that stopped telling you anything about the engine’s displacement a long time ago.

In short. AMG was founded in 1967 in Burgstall an der Murr as an independent race-engine shop, and has been wholly owned by the Daimler/Mercedes-Benz Group since 2005. The “one man, one engine” principle was formalised in 2002. Since the mid-2010s, the 35/43/45/53/63/63 S E Performance badges denote a power class, not engine displacement.

From a garage in Burgstall to a group division

The shop whose founders’ names gave AMG its acronym — Aufrecht, Melcher, Großaspach — opened in 1967 in a garage beneath Aufrecht’s house. It did what shops like that do: hopping up race engines for customers willing to pay for extra power. One race built the brand’s public reputation: in 1971, at the Spa-Francorchamps 24 Hours, the Mercedes-Benz 300 SEL 6.8, nicknamed the “Red Pig,” won its class. A small workshop beat the factory teams on their own turf, and that’s the kind of story that turns into customers.

The founders’ paths then split physically: in 1976 the main operation moved to Affalterbach, while Melcher stayed working in Burgstall separately. The first big product built on a production Mercedes came a decade later — the 300 E 5.6 AMG, known as the “Hammer,” with a 360-hp engine, informally billed by the press as the fastest sedan in the world. This was no longer race tuning; it was turning an executive car into something it never was from the factory.

Getting closer to Daimler-Benz took the following decade and a half. A 1990 cooperation agreement and the first jointly built production model — the 1993 C 36 AMG — turned AMG from an outside atelier into an official partner with access to the dealer network. After that, the group simply bought up one stake after another: a controlling share in 1999, full ownership in 2005, when Aufrecht sold his remaining stake. From that point on, AMG isn’t a partner of Mercedes-Benz — it’s a structural division of it, and the question of “whose cars are these” stopped being interesting.

The step that mattered most for the brand’s image happened not in a legal filing but on the shop floor: since 2002, every assembled AMG engine has carried a nameplate bearing its builder’s signature — visible proof that one person built the engine from start to finish. Hand assembly existed before that, but 2002 is when it was turned into a tangible marketing asset that set AMG apart from an ordinary tuning house.

There’s one more milestone that doesn’t fit neatly into a table with a date: the shift from reworking other people’s cars to developing its own. Every project listed above, from the “Hammer” to the C 36, started from a finished Mercedes-Benz body that AMG then hopped up with an engine and chassis tuning. The first exception was a sports car with gullwing doors, designed by the division from a blank sheet, with no ready-made Mercedes-Benz platform underneath it — AMG itself calls this project the first car it developed entirely on its own. The idea didn’t stay a one-off experiment: it became the basis for today’s four-door and two-door GT coupé line, covered below, and it marked the line between an AMG version of a production model and an AMG car designed from the ground up.

Engines: from the naturally aspirated V8 to a turbo four wearing the “63” badge

AMG’s history as an engineering house reads better through its engines than through dates. The M156 — a 6.2-litre naturally aspirated V8 that powered the C63, E63, and, in a hopped-up form, the SLS AMG between 2006 and 2015 — remains the benchmark for AMG’s “analogue” character: instant throttle response and a roar with no electronic assistance. It was succeeded by the M157, a twin-turbo version of the same displacement, built for efficiency and torque, and then by the M177/M178 family, a four-litre V8 with turbos nestled in the vee, which became the main engine of the top of the range from 2015 onward. It’s the M177 that sits in the G63 (585 hp), and AMG has supplied it for Aston Martin’s Vantage, DB11, and DBX engines since 2017 — a rare case of a German division’s own engine ending up under the bonnet of a British sports car.

Alongside the big V8s, a line of compact turbo engines developed in parallel. The M139 — a two-litre turbo four that has powered the A45 and CLA45 since 2019 — was the most powerful series-production four-cylinder engine in the world when it launched (421 hp in the S version), and it too is hand-built with a signed nameplate; AMG has licensed the same block to Lotus for the Emira. A separate line is the M256, a three-litre straight-six with a 48-volt electric supercharger, which underpins the “53”-badged models: the GLE 53, the E 53, and the four-door GT 43, covered below. And finally there’s the M254 — not an AMG design at all, but a production Mercedes-Benz engine that carries the AMG badge in the GT 43 without any rework of the block: exactly the kind of thing critics point to as the clearest symptom of a blurred hierarchy.

The top of the range today is the hybrid “63 S E Performance” models: the GT 63 S E Performance, with 816 hp of combined system output, and the C 63 S E Performance, where a two-litre turbo four is joined by an electric motor on the rear axle and a 6.1 kWh battery for a combined 680 hp. The market’s reception of that move has been cool — more on why in the section on disputed decisions, below.

What the 35–63 S E Performance badges mean

Until the mid-2000s, the number in an AMG name was nearly honest: 63 meant a 6.3-litre V8, 55 meant 5.5 litres. That link disappeared with the move to turbocharging and hybridisation. On the SL line, the “63” and “65” badges have officially been fixed as power-class names since 2008 — regardless of the actual displacement under the bonnet. Since then the hierarchy has worked like this: 35 and 43 are compact turbo engines (a four or a lightened six), 45 is a top-tier hopped-up turbo four, 53 is a mild-hybrid straight-six with a 48-volt system, and 63 and 63 S are the heavy artillery — a twin-turbo V8 or its hybrid version.

A curious side effect of that nomenclature is two completely different engines sharing the same “43” badge in two different GT-line coupés. The four-door X290 GT 43 has the M256 straight-six with the electric supercharger; the second-generation two-door C192 coupé carries the same badge over a two-litre M139 turbo four with a starter-generator. The same number on the boot lid doesn’t mean the same engine — it means the same power class within its own line, and nothing more.

The peak of that blurring is assigning the “63” badge to the C-Class’s four-cylinder hybrid: 680 hp of combined output sounds impressive, but historically “63” always meant a V8, and part of the audience read a turbo four wearing that badge as a substitution. The market’s response has been concrete: sales of the current C 63 have been called a flop in the trade press, and AMG has announced a partial retreat — a new engine, the M177 Evo, a twin-turbo 4.0-litre V8, is being prepared for future generations of the E63, CLE, and S63, while a GLC 53 with a turbo straight-six will replace both the GLC 43 and the hybrid GLC 63 at once.

Disputed: the hand-assembly myth, and two views on electrification

AMG’s official line is broad: every engine is hand-built by one specialist, who fits a signed nameplate to it. That’s been confirmed since 2002 and extends even to engines AMG supplies to other brands, including the V8 for Aston Martin. But whether the principle applies equally to every engine in the line-up is a question the brand’s own site doesn’t answer directly. Base turbo fours and mild-hybrid straight-sixes, built on production Mercedes-Benz engine platforms, are unlikely, by the logic of the production process, to go through the same amount of hand finishing as a V8 or the M139 — but AMG doesn’t publish an official list of exceptions, and that can’t be stated as fact.

The second disputed point is electrification itself. AMG runs two parallel narratives at once. On one side is active marketing of the range’s electric versions, built around the sound, design, and feel meant to replace the familiar V8 roar. On the other is a public signal from 2026 that, for the heart of the range — the mid- and large-sized “63” models — the division is deliberately going back to a bigger internal-combustion engine, leaving electrification as an add-on to the V8 rather than its replacement. Both directions are developing in parallel, and which one ends up dominant for AMG a few years from now hasn’t been settled by the brand itself.

AMG models in the VertexRent fleet

Part of this article’s logic is easier to see on specific cars than on abstract badges. The fleet includes an SUV version of the M177 without the electrical top-up — the Mercedes-AMG G63 2023 — and its successor with the 48-volt system, the Mercedes-AMG G63 2025: the difference between them is exactly the power-electronics update discussed above for the range as a whole.

The “43” badge is represented by the Mercedes-AMG SL 43 roadster — the first four-cylinder engine in SL history, and the first SL designed by AMG itself from scratch rather than handed over ready-made by Mercedes-Benz. The four-door GT line in the fleet is represented by two steps on the same X290 platform: the Mercedes-AMG GT 43 4-Door with the M256 straight-six, and the top-spec Mercedes-AMG GT 63 S on the twin-turbo V8 — a rare chance to compare the line’s two engine families, “43 versus 63,” on the same body.

Finally, the eight-cylinder C-Class era discussed in the section on disputed badges is available as the Mercedes-AMG C63 Coupé W205 — the last C63 generation with a genuine twin-turbo V8 before the move to the hybrid turbo four. The full fleet list is in the catalogue section.

Frequently asked questions

Is AMG still an independent company, or fully part of Mercedes? Fully a division of Mercedes-Benz Group. AMG was an independent shop from 1967 to 1999, when Daimler-Chrysler bought a controlling stake; since 2005, after Hans-Werner Aufrecht sold his remaining share, AMG has been a wholly owned subsidiary of the group, headquartered in Affalterbach.

Is it true that one person builds each AMG engine? That’s how the brand puts it, and since 2002 it’s been backed by a visible system of signed nameplates on the engine. Whether the principle applies equally to every engine in the range — including base turbo fours and mild-hybrid sixes built on production Mercedes-Benz engine platforms — isn’t officially spelled out.

Why does the AMG G63 have 585 hp while the GT 43 has only “43” in its badge, when both are turbocharged? The badge stopped meaning displacement or power directly a long time ago — since the mid-2010s it denotes a class within the range. The G63 carries the M177 twin-turbo V8, while the GT 43 carries the lower-power M256 straight-six with an electric supercharger; the numbers “63” and “43” here show a model’s place in AMG’s hierarchy, not a direct horsepower comparison.

Why did AMG launch a four-cylinder C63 when it used to have a V8? To meet emissions rules and as part of the range’s broader shift to hybridisation: a turbo four with an electric motor on the rear axle produces 680 hp of combined output — more than the old V8. The market’s reception has been cool, the model’s sales have been called a flop in the press, and AMG has already announced a return to a larger engine for neighbouring models in the range.

What’s the difference between the GT 43 and GT 63 S if it’s the same platform? Only the engine and chassis tuning. The GT 43 has the mild-hybrid M256 straight-six; the GT 63 S has the twin-turbo M177 V8 paired with AMG’s signature drift mode. The body, the X290 platform, and the seating are the same on both versions.

Are Alpina and Brabus also AMG, or something else? No — they’re tuning houses independent of Mercedes, with their own history and a legal status separate from AMG’s.

Why is AMG going back to larger engines after 2025? Because of the market’s commercial response to going too far with downsizing: the hybrid four-cylinder C63 sold worse than expected. In response, AMG is preparing a new V8, the M177 Evo, for future generations of the E63, CLE, and S63, and is moving the GLC line to a single turbo straight-six engine instead of separate turbo-four and hybrid versions.