Bentley has been synonymous with turbocharging since the 1982 Mulsanne Turbo strapped a single Garrett to the 6.75 V8 and created the modern super-saloon. Boost Lab, Inc. rebuilds four decades of blown Bentleys: the classic Garrett-equipped Turbo R, Continental R and Azure 6.75 cars, the 6.0 W12 twin turbos across three Continental GT generations, the hot-vee 4.0 V8 cars, and the Bentayga. Crewe assemblies price like the cars; the hardware rebuilds. Nationwide ship-in service.
From one big Garrett on a carbureted 6.75 to four turbos on a Bentayga Speed's W12 era stablemates: the map.
The cars that invented the 300-plus-horsepower luxury express ran a single large Garrett on the 6.75 V8, draw-through carbureted on the earliest Mulsanne Turbos, blow-through injected from the mid-80s. These are 30-to-40-year-old turbos on heavy, torquey engines, and surviving cores arrive with honest age: coked centers, tired seals, worn journals. All rebuild, and originality on RY-era cars is worth preserving.
The late classic era splits: Continental T and Azure continue the 6.75 Garrett formula at up to 420 hp, while early Arnages ran the BMW twin-turbo 4.4 V8 before Crewe returned the 6.75 in the Arnage Red Label. Know which engine you have; the turbo hardware differs completely.
The VW-era 6.0 W12 twin turbo defined the modern Bentley: 552 hp at launch, 650-plus in Speed trim by the end. Three generations of hardware, all twin, all bank-specific, all buried in a very full engine bay. High-mileage GTs are now cheap to buy and expensive at the dealer, which makes turbo rebuilds the sane path for the second and third owners keeping them alive.
The 4.0 twin-turbo V8 mounts its turbos inside the vee, sharing architecture with the Audi-family hot-vee V8s. Instant response, ferocious heat soak, and the classic hot-vee failure pattern: coked centers and restricted feed lines on hard-driven cars.
The Bentayga runs the same W12 and hot-vee V8 families under SUV duty cycles: mass, towing, and real mileage accumulation. Its turbos age fastest in the range and its rebuild economics against Crewe assemblies are the most compelling in the lineup.
Bentley dealer turbo assemblies price in the thousands per unit, and the W12 needs two. Underneath sit conventional journal-bearing cartridges from mainstream supplier families with deep parts support. Rebuilding your originals costs a fraction, preserves matching hardware, and keeps a depreciated GT economically viable.
Early Continental GTs now trade for used-Camry money, and their W12s carry two turbos each priced like the car's whole value at the dealer. This is exactly where rebuilding wins: the labor to open a W12 bay is real, so do the pair once, replace the oil feed and coolant lines while everything is accessible, and the car runs another decade for a fraction of the assembly quote. Third-owner GTs are some of the most satisfying rebuild economics we see.
Bentley services turbos VIN-specifically through dealer channels, and units identify by tag, bank and generation. Here is how the families map. Search by any term.
| Turbo PN | Model | OEM PN | Application | Notes |
|---|---|---|---|---|
| Tag-specific | Garrett (large single) | Crewe channel, largely discontinued | 1982-1985 Mulsanne Turbo (carbureted draw-through) | Earliest cars; collector documentation |
| Tag-specific | Garrett (blow-through) | Crewe channel, largely discontinued | 1985-1998 Turbo R, Continental R, Turbo RT | The definitive classic Bentley turbo |
| Tag-specific | Garrett (uprated) | Crewe channel | Continental T, Azure, Arnage Red Label 6.75 | Late classic-era spec |
| Tag-specific by bank | BMW-era twins | Crewe/BMW channel | 1998-2000 Arnage Green Label 4.4 V8 | Completely different hardware from 6.75 cars |
| Tag-specific by bank | W12 twins, Gen 1 | Crewe channel by VIN | 2003-2011 Continental GT, Flying Spur 6.0 W12 | Bank-specific pair; the high-volume rebuild |
| Tag-specific by bank | W12 twins, Gen 2 / 3 | Crewe channel by VIN | 2011+ GT, Spur, Bentayga W12 and Speed | Generation and rating specific; tag governs |
| Tag-specific by bank | 4.0 V8 hot-vee twins | Crewe channel by VIN | 2012+ GT V8, Spur V8, Bentayga V8 | Audi-family hot-vee architecture |
| Send tag photos | All Bentley applications | n/a | Identification service | We identify by tag, bank and generation before quoting |
Heavy cars, big heat, and long service lives: the patterns by era.
Turbo Rs moved two and a half tons on one turbo for decades, and hot shutdowns baked their centers long before synthetic oil culture. Coking plus age is the default classic-era presentation. Passages cleaned to bare metal, modern seals fitted, originals preserved.
The W12 bay traps heat around both twins, and 100,000-plus-mile GTs arrive with journal wear on both sides: whine, play, oil consumption. Conventional cartridges, routine rebuild, always as a pair given what the access labor costs.
Same story as every hot-vee engine: turbos in the valley soak heat, feed lines coke, bearings starve. Lines and banjo hardware replaced with every hot-vee rebuild, and the idle-down habit protects the fresh pair.
Bentleys of every era sit. Storage-hardened seals smoke on the season's first drive, and the cores underneath are usually excellent. Modern seal materials tolerate storage far better than what the classics left Crewe with.
Towing, mass and genuine daily mileage make the Bentayga's turbos the hardest-working in the range, and they arrive youngest. Rebuild economics against dealer assemblies are correspondingly the strongest.
Electronic actuators on W12 and V8 cars fail independently of cartridges, throwing boost faults that read like dead turbos. We test actuators first and tell you honestly when the fix is smaller than a pair.
Yes, and it is exactly what these cars need: the classic Garrett units respond beautifully to a conservative rebuild with modern seal materials, cleaned centers and preserved original castings. Note the car and registry context in your submission and we document the work.
Rebuild both originals. The W12 twins are conventional journal-bearing units with strong parts support, and a pair rebuild typically costs a fraction of one dealer assembly. Replace the feed and coolant lines during the same labor and the car runs another decade.
No. The 6.0 W12 runs bank-specific twins in its own configuration across three generations, and the 4.0 V8 runs hot-vee twins from a different architecture entirely. Tag photos settle exactly what you have.
Oil feed lines and banjo hardware on every rebuild, coolant lines on the hot-vee V8s and W12s while access exists, and a fresh oil service before the rebuilt pair runs. Restricted lines are how fresh turbos die young.
Green Label Arnages of 1998-2000 run the BMW twin-turbo 4.4 V8; the Red Label returned the 6.75 with its Garrett hardware. The two share nothing. Check the engine, or send photos and we will identify it.
Start at repair.theboostlab.com, note model, year and VIN, label left and right on twins, drain oil and coolant passages, cap the openings, and double-box with solid foam. Ship to Boost Lab, Inc., 37833 Pineapple Ave, Unit A, Dade City, FL 33523.