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BMW M5

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Generations of BMW M5

The BMW M5 is the high-performance version of the BMW 5-Series automobile made by BMW Motorsport. M5 versions of the E28, E34, E39 and E60 5-Series have been made.

E28 M5 (1984-1987)

Main article: BMW M5 (E28)

The first M5, based on the E28 5-Series, made its debut at the 1984 Amsterdam Motor Show. It was the product of demand for an automobile with the carrying capacity of a saloon (sedan), but the overall performance of a sports car. It utilized the 535i chassis and an evolution of the engine from the BMW M1. The M5 was handbuilt by Motorsport technicians and at its launch was the fastest production saloon (sedan) in the world.

The M5 was offered in four different versions. The first version was the Left Hand Drive (LHD) Euro Spec M5. The second version was the Right Hand Drive (RHD) Spec M5. The third version was the North American Spec (NA or so-called 1988) M5. The fourth version was the South African (ZA) Spec M5.

The LHD, RHD Euro Spec M5s and the ZA spec M5s had the M88/3 powerplant which delivered 286 hp DIN (210 kW) whereas the North American 1988 M5 was equipped with a catalytic converter, which reduced the power output to 256 hp DIN (191 kW).

Specification

  • DC91: (LHD EURO) => M88/3 engine 286 hp (DIN)
  • DC92: (RHD EURO) => M88/3 engine 286 hp (DIN)
  • DC93: (LHD US) => S38B35 engine 256 hp (SAE)
  • DC98: (RHD SA) => M88/3 engine 286 hp (DIN)

Performance

At the time of sale, BMW quoted the following (relatively poor) 0-60 times to give the impression that the E28 M5 did not outperform the more expensive, heavier and top-of-the-range E24 M635csi.

  • (Euro) - 286 hp 0-60 mph - 6.2 s. Top Speed: 153 mph
  • (USA) - 256 hp 0-60 mph - 6.5 s. Top Speed: 148 mph

Special versions

  • Whilst BMW Motorsport did not built any special versions of the E28 M5, the German tuner Hartge produced the Hartge H35S-24, a 330 PS (325 hp/243 kW) version of the E28 M5. Main modifications over and above the standard E28 M5 were revised cams, a modified exhaust, modified Motronic ECU programming and a revised (and lowered) suspension setup.
  • Alpina limited their tuning efforts to the older M30 engine powered models.
  • Alpina B7 Turbo 300-330hp (0-60: 4,7 sec, 168mph)

E34 M5 (1988-1995)

Main article: BMW M5 (E34)

The E34 M5 was produced from 1988 to 1995, although sales in North America started in 1991 and ended in 1993. It was produced at BMW M GmbH in Garching, Germany and like the previous M5, was entirely hand-built. It utilized the 535i chassis which was produced at BMW's Dingolfing plant. Assembly was done either by a single M employee or a team of M employees and generally took about two weeks. It is rumored that the test drivers of the E34 M5 could determine who or what team made each specific M5, due to characteristic quirks of the handbuilt nature of the E34 M5. The engines were also built by hand by BMW M technicians. All of the E34 M5 powerplants were built to 5% of advertised output.

The early E34 M5 used an evolution of the 24-valve I6 found in the E28 M5 and E24 M635CSi/M6. Designated S38B36, the engine technically remains a 3.5 L, with a bore of 93.4 mm and stroke of 86 mm for a total capacity of 3535 cc. The added stroke is due to a new forged steel crankshaft, though the camshafts were also changed. Compression was up slightly (10:1 versus 9.8:1). Other adjustments made included an electronically controlled butterfly valve in the intake plenum which provided better low rpm and mid-range power. The engine also featured an improved flywheel, Bosch Motronic fuel injection, equal length stainless steel headers and three way ceramic catalysts.

The E34 M5 had a highly-tuned I6 engine called the S38B36. Originally it had a displacement of 3.6 L and produced 315 hp (235 kW), and 266 lb·ft @ 4750 RPM. Cars sold in North America and Switzerland which, due to a different catalytic converter, produced 310 hp (229 kW).

In may 1992, the engine displacement was increased to 3.8 L with the S38B38, except in North America, which continued with the 3.6 L engine. Power was now increased to 340 hp (250 kW) SAE . Also in 1992, a Touring version was introduced in LHD form only.

The M5 came with an unusual wheel design. From 1988-1992 the M5 featured the M-System wheels. These wheels were 8x17J, but came with a bolted-on wheel cover. Under the cover was a black 5-spoke alloy wheel. The press was critical of the design, often claming it gave the M5 the appearance of having "white-wall" tires. In 1992 BMW changed the design and a new cover was produced – the M-System II. The original intent of the M-System cover was to direct more air to the brake assembly to increase cooling. The cover actually integrated a fin assembly behind the cover. The M-System II covers, known as the "throwing stars" did not have as much capability to direct air to the brake assemblies. In late 1994, the M5 came with M Parallel wheels that did away with the cover.

Specification

  • HD91 (88-91 LHD Euro) I6-24v 3.6 L - 232 kW/315 hp (DIN) (only available with 5-speed manual transmission)
  • HD92 (89-91 RHD Euro) I6-24v 3.6 L - 232 kW/315 hp (DIN) (only available with 5-speed manual transmission)
  • HD93 (90-93 LHD US) I6-24v 3.6 L - 232 kW/310 hp (SAE) (only available with 5-speed manual transmission)
  • HC91 (92-94 LHD Euro) I6-24v 3.8 L - 250 kW/340 hp (SAE) (only available with 5-speed manual transmission)
  • HC91 (94-95 LHD Euro) I6-24v 3.8 L - 250 kW/340 hp (SAE) (only available with 6-speed manual transmission)
  • HC92 (92-94 RHD Euro) I6-24v 3.8 L - 250 kW/340 hp (SAE) (only available with 5-speed manual transmission)
  • HC92 (94-95 RHD Euro) I6-24v 3.8 L - 250 kW/340 hp (SAE) (only available with 6-speed manual transmission)
  • HJ91 (92-94 LHD Euro Touring) I6-24v 3.8 L - 250 kW/340 hp (SAE) (only available with 5-speed manual transmission)
  • HJ91 (94-95 LHD Euro Touring) I6-24v 3.8 L - 250 kW/340 hp (SAE) (only available with 6-speed manual transmission)
  • 89-95 (ECE/GB/USA) - (no automatic transmission available)

Performance

  • 89-92 (Euro) I6-24v 3.6 L - 232 kW/315 hp 0-60 mph - 6.3 s. Top speed: 155 mph (electronic limited)
  • 92-95 (Euro) I6-24v 3.8 L - 250 kW/340 hp 0-60 mph - 5.9/5.7 sec*. Top speed: 155 mph (electronic limited)
  • 91-93 (USA) I6-24v 3.6 L - 229kW/311 hp 0-60 mph - 6.4 s. Top speed: 155 mph (electronic limited)

* (available only with 6-speed manual transmission)

Special versions

  • Cecotto Edition — A total of 22 Cecotto E34 M5s were produced with options of having either Lagoon Green metallic (266) and Mauritius Blue metallic paint (287).
  • Winkelhock Edition — A total of 51 Winkelhock E34 M5s were produced with the options of having Jet Black (668) with contrasting lower body panels in Sterling Silver metallic paint (244).
  • 20 Jahre Motorsport Edition — To celebrate BMW Motorsport 20th anniversary, BMW had built 20 specially equipped Euro-spec M5s in late 1992.
  • UK Limited Edition — To commemorate the end of right-hand drive E34 M5 production, 50 examples of the E34 M5 Limited Edition were assembled between March and June of 1995.

E39 M5 (1998-2003)

2003 BMW M5 (E39)

Unlike its predecessors, the E39 M5 was not handbuilt at the BMW M GmbH factory; it was produced on the same assembly line as the normal E39 5-series at the Dingolfing factory in Germany.

Introduced in 1998 at the Geneva Motor Show, production did not begin until late October of that year. A total of 20,482 E39 M5s were made from 1998 to 2003. BMW M produced three versions of the E39 M5, the European LHD and RHD versions and the North American specification version.

The E39 M5 had a highly tuned V8 engine based on the M62 engine called the S62, which displaced 4.9 L and produced 400 bhp (294 kW). The engine featured a 7000 RPM redline, Double-VANOS, which varies the intake and exhaust valves for both cylinder banks, and individual throttle butterflies for each of the cylinders, allowing for a much faster engine response time.

All E39 M5s were equipped with a Getrag Type D six-speed manual transmission with the following gearing ratios:

4.23(1), 2.54(2), 1.62(3), 1.23(4), 1.00(5), 0.83(6)

It is the same transmission used in the E39 540i but some changes were made to cope with the extra power the S62 engine produced. A reinforced clutch, rear differential utilizing a shorter 3.15:1 ratio and a limited slip differential with 25% maximum locking.

The E39 M5 suspension shared its basic aluminium-intensive MacPherson strut/multi-link design of the V8 E39 5 series. However, several changes were made by BMW M. Reduced spring height, 0.9 inch (23 mm) lower. A specific shock valving, thicker front and rear anti-roll bars, polyurethane auxilliary springs and steel balljoints.

Like all V8-powered E39 models, the E39 M5 was equipped with a recirculating-ball steering system. Overall steering ratio was reduced to 14.7 from 17.9 it featured a servotronic vehicle-speed-sensitive power assist that provides two levels of resistance controlled via console mounted Sport button (Which also adjusts the electronic throttle, making for more responsive pedal feel). The E39 M5 is equipped with four-wheel vented disc brakes measuring 13.6" in diameter in front and 12.9" in diameter in the rear. On European-specification models, the rotors are of a "floating" two-piece design for reduced risk of warping. Their lower unsprung weight improves ride quality and traction on bumpy surfaces as well. Anti-lock brakes were standard.

During its 5 years in production, there were some cosmetic changes, these include:

  • Revised headlight design incorporating illuminated "Angel Eye" rings
  • Jeweled tail light design
  • Park Distance Control sensors in the front bumper (previously in rear only)
  • Thicker three-spoke M steering wheel identical to the one fitted to the E46 M3
  • Grey instrument panel
  • Improved solar sensor for standard automatic climate control
  • Revised navigation/audio unit with larger (6.5-inch) monitor
  • Rear head protection airbags added
  • Second-generation M Mobility tire repair system in place of earlier version
  • Available M Audio System with special tweeters, Kevlar/carbon coaxial speakers and two subwoofers behind the rear console
  • Alcantara headliner included with Extended Leather interior (previously only included with Complete Leather)

For the subsequent two model years, changes were limited to the addition of new exterior colors (from 9/01 production) and the upgrade to a DVD-based navigation system (from 9/02 production).

The E39 M5 is capable of accelerating from 0-60 mph in 5.3 seconds* and electronically limited to a top speed of 155 mph*, making it the fastest 4-door sedan in the world at that time.

* (factory sheet)

Specification

  • (Euro) 5.0 L V8-32 - 294 kW (400 hp)
  • (USA) 5.0 L V8-32 - 290 kW (394bhp)

Performance

  • 294 kW (400 hp) 0-60 mph - 4.7 s. Top Speed: 250 km/h (155 mph) (electronic limited), 298 km/h (186 mph) (without electronic limiter)

E60 M5 (2004-Present)

File:BMW M5 (E60) silver vr.jpg
E60 M5

The E60 M5 was introduced in 2004. It has a naturally aspirated 5.0 L BMW V10 S85 engine redlining at 8250 RPM and developing a peak output of 507 PS (373 kW, 500 SAE hp). Other key features include a stiffened aluminum chassis and a 7-speed SMG III manual transmission. The car weighed the same as the E39 of 1800 kg.

The BMW M5, along with the new M6, were designed to use the new SMG III electrohydraulic manual transmission. Therefore, they will initially only be offered with this new transmission. There was a relative uproar amongst the fans and buyer-base when this was announced—however, BMW announced the eventual availability of a 6-speed manual transmission in North American markets.

The M5, features several F1 inspired engine and transmission controls including Launch Control, Dynamic Stability Control, and the option of changing to either automatic or manual as well as the speed at which shifts are completed.

Specification

  • 5.0 L 40v V10 - 373 kW (507 PS)

Performance

  • 373 kW (507 PS) 0-60 mph - 4.7 s. Top speed: 250 km/h (155 mph) (electronic limited), 330 km/h (205 mph) (without electronic limiter)
  • Road and Track Feb 2006 tested 0-60 in 4.1 seconds.

External links

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