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1987 Porsche 911 Turbo ‘Flachbau’

1987 Porsche 911 Turbo ‘Flachbau’

In 1986 Porsche finally offered the slantnose, called Flachbau in German, straight from the factory. The official designation in the UK was Turbo SE and it is also sometimes referred to as the flatnose. Offered as the ultimate 930 Turbo, the this model had an upgraded body and a 330 bhp engine.

Costing nearly double the standard model, the Flachbau was rarely ordered. Before 1986, Porsche had offered the Flachbau body option out of its customer service department known as Sonderwunschen. These were handmade cars, not limited to just the Turbo, but the Carrera and Carrera SC as well. In the 1987 model year, these were productionized with the M505 code for USA for an astounding $23,244 extra and M506 for the rest of the world.

Despite the panels being slightly heavier, they were modeled after the 935 race car for top speed. The conversion required extended rocker panels, wider rear flares with scooped vents and flip-up headlights up front with functional louvres.

With a jump in horsepower, it’s not surprising that the Flachbau was the fastest of all 930 models, reaching a factory claimed 171 mph. Acceleration was rated by the factory at 0-100 kph in 5.2 seconds.

The Flachbau was sold worldwide including in the US. Over 800 models were sold.

In Detail

tags 930, flatnose, slantnose
submitted by Richard Owen
type Series Production Car
built at Stuttgart, Germany
production 800
price £/td> £97,600
engine Turbocharged Flat-6
position Rear Longitudinal
aspiration KKK Turbocharger
valvetrain SOHC, 2 Valves per Cyl
fuel feed Bosch K-Jetronic Injection
displacement 3299 cc / 201.3 in³
bore 97.0 mm / 3.82 in
stroke 74.4 mm / 2.93 in
compression 7.0:1
power 246.1 kw / 330 bhp @ 5500 rpm
specific output 100.03 bhp per litre
bhp/weight 232.56 bhp per tonne
torque 431.2 nm / 318 ft lbs @ 4000 rpm
redline 7000
body / frame Unitary Steel Monocoque
driven wheels RWD
wheel type Forged Light Alloy
front tires 205/50ZR-16
rear tires 255/50VR-16
front brakes Vented & Cross-Drilled Discs w/ Vacuum Assist
front wheels F 40.6 x 17.8 cm / 16.0 x 7.0 in
rear wheels R 40.6 x 20.3 cm / 16.0 x 8.0 in
steering Rack & Pinion
curb weight 1419 kg / 3126 lbs
wheelbase 2272 mm / 89.4 in
front track 1433 mm / 56.4 in
rear track 1501 mm / 59.1 in
length 4290 mm / 168.9 in
width 1775 mm / 69.9 in
height 1311 mm / 51.6 in
transmission 4-Speed Manual
gear ratios 2.25:1, 1.30:1, 0.89:1, 0.625:1
final drive 4.22:1
top speed ~275.14 kph / 171 mph
0 – 100 mph ~5.2 seconds

Auction Sales History


1987 Porsche 930 Slantnose Coupe WP0JB0932HS050488 – sold for $134,750 Highly original, low-mileage example. Factory-optioned M505 Slantnose 930. North American Show History and Automobile cover car. Elegant Diamond Blue Metallic over Burgundy livery. Offered with books, tools, window sticker COA and CARFAX.
Auction Source: 2015 Quail Lodge Auction by Bonhams


1988 Porsche 930 S WP0JB0938JS050193 – sold for $154,000 One of Only 148 Slantnose Coupes Imported for 1988. Unrestored and in Stunning Condition. Porsche Club of America Concours Award Winner. Classic Color Combination of Guards Red with Black Leather.
Auction Source: The Pebble Beach Auctions 2015 by Gooding and Company
1988 Porsche 911 Turbo ‘Slant Nose’ Cabriolet WP0EB093XJS070320 – sold for $363,000 One of 591 factory Turbo Slant Nose Cabriolets built for the U.S. in 1988. Only 2,401 miles from new; many desirable options. Includes a Porsche Certificate of Authenticity.
Auction Source: 2015 Amelia Island by RM Sotheby’s
1988 Porsche 911 Turbo Cabriolet WP0EB093XJS070379 – sold for $60,000 Very rare factory Turbo Slantnose Cabriolet. Actual Porsche factory built Slantnose. Comes with Porsche Certificate of Authenticity.
Auction Source: Kissimmee 2014, #WhereTheCarsAre by Mecum

1987 Porsche 911 Turbo Slantnose

Factory original Slantnose body (505 option code) Turbo coupe. 1 of 144 built in 1987. 1 of 349 in total from 1987-1989. Documented 28,560 original miles. Factory Guards Red with Black leather interior. Electric sunroof. Limited slip differential. Dual power seats with driver lumbar adjustments. Porsche certificate of authenticity. Complete maintenance records. Complete original handbooks. Original tools and compressor. Original option code sticker still under the hood. Clean CarFax.

Auction Source: The Daytime Auction in Monterey by Mecum

1987 Porsche 911 Turbo ‘Flachbau’

This 930S is one of only 305 slantnose- optioned turbo cabriolets to be imported to the US between 1987 and 1989, and it is believed that this car is one of only two such cars produced in 1988 that offer factory-ordered RUF tuning upgrades. Following its completion on March 15, 1988, this 930S was delivered to the longtime Porsche-approved tuner RUF for performance modifications, including a turbo upgrade, turbo boost control and a dual-port four-pipe exhaust system. RUF also added some attractive body modifications, such as a roll bar, 17″ chrome wheels, a RUF front air dam and an RUF badge that proudly adorns the rear fascia.

Auction Source: 2011 Scottsdale Auction by Gooding & Company