CARS & HISTORY: TATRA T87 (1936-1950)

The Tatra company had only just introduced the T77a as an update for the T77 when design engineer Erich Überlacker was already driving around in a unique modified two-door T77a test car. This car was fitted with a newly designed aluminium air-cooled V8 engine which was to be used in a successor to the T77 and T77a. Hans Ledwinka, the chief designer of the T77 and T77a, was not entirely satisfied with these models. He considered both cars to be too big and heavy, in particular at the rear end where the engine was mounted. In Ledwinka's opinion the possible successor for the T77 should have the same general design and layout, but gain considerable advantages in compactness, gracefullness and weight. In 1936 this resulted in the T87, probably the most famous and distinctive model of the entire range of aerodynamic Tatra passenger cars. The T87 was a radical change to the T77, incorporating a big number of improvements made to the original T77 design. Compared with to T77 the aerodynamic body was now shortened, made totally self-supporting and fully integrated with the welded box frame. It was the first steel made monocoque body construction by Tatra, in the Czech Republic and even one of the very firsts in Europe. The only disadvantage of the shortened body was a small loss in aerodynamic efficiency, increasing the coëfficient of aerodynamic drag to a value of 0.251. Although this is slighty higher then the T77a's 0.212 it's still well below the value for most modern production cars.

<<< Tatra design engineer Erich Überlacker with the T77A test-car, equipped with the new aluminium air-cooled V8-engine destined for the T87 (1935)

One of the other most significant changes incorporated into the T87 was an improvement on the T77's rather heavy rear end. Ledwinka's aim was to reduce the weight of the entire car and increase the weight distribution by lightening the rear end in particular. Therefore the T87 was equipped with a smaller light alloy OHC V8 engine of 2968 cc. In total a 330 kg weight reduction was gained compared to the original T77. An engine bore x stroke of 75 x 84 mm and a compression ratio of 5.6:1 gave the engine a power output of 55.2 kW (75 hp) @ 3500 rpm. The engine was able to propel the car to a top speed of 160 km/h and a cruising speed of 130 km/h, making it one of the fastest serially produced cars of its time. Besides the great performance of the T87 it was also a real luxury car which couldn't be compared to anything else available at that time.

<<< Cut-away drawing of the T87, taken from period advertising, showing the spacious interior with luggage compartment behind the rear seat, spare wheel in front and air-cooled aluminium V8-engine in rear (1936)

In 1937 three pre-serial production cars were build of the T87, named the V787, which were presented at the Prague AutoSalon in 1937.

One of three build pre-serial V787 cars which were presented at the Automobil-Salon 1937 in Prague. The sun-roof is similar to the roof of the T77, the rear window between passengers compartment and the engine is divided similar to the T97, the shape of the front fenders ends with an edge in the front door and the dashboard was very simple with only one instrument - the speedometer - and differs to the first 1938-1939 production series [thanks to TATRA-Freunde International e.V. for pictures and description].

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The pre-serial V787 with slight differences to the first T87 production series of 1938-1939 (1937) >>>



<<< The first production version of the T87 with a three-headlight front, a three-piece windscreen and three side windows (1937)

<<< The first production version of the T87 featured side air-scoops as well as air louvres on the rear bonnet, through which the driver had limited rear vision (1937)

STREAMLINING & INDUSTRIAL DESIGN
Streamlining was the marketing gimique of the 1930s. Streamlined shapes were applied to virtually everything, from pencil sharpeners and telephones to trains and automobiles.
Either moving or stationairy, streamlining had everything to do with marketing and little to do with efficiency. The 1930s Tatra T77, T87 and T97 however are superb examples of functional streamlining.

The Tatra T87 was designed and constructed in a time when Czechoslovakia was at the cutting edge of technology, industrial design, architecture and art. Like the T77, the T87 was often associated with modernism and featured in press photographs in front of modern style houses and buildings. The T87 was a perfect example of Czech engineering excellence and industrial design. The year 1936 also saw the introduction of a new highspeed aerodynamic express train called the Slovak Missile. It was equipped with two Tatra-engines of 175 hp, which made it possible to cover the 397 km from Prague to Bratislava (with a single stop in Brno) in 4 hours and 51 minutes cutting the previous journey time by one hour.


<<< Advertisment for the CzechoSlovakian high-speed train Slovenska Strela (Slovak Missile), euipped with two Tatra-engines of 175 hp each, which could run the 397 km from Prague to Bratislava in 4 hours and 51 minutes (1936)

 German advertisement for the aerodynamic Tatra T87 with rear-mounted air-cooled V8-engine and a maximum speed of 160 km/h (1936) >>>


Before WW II the T87 was on sale in Germany at a price of RM 8450,-, ranking it at the very top of the luxury car market. Its comparable competition consisted of the following aerodynamic production passenger cars, available in Germany at that time:

Tatra T87 VW KdF-Wagen Steyr 55 Hanomag 1,3l Adler 2,5l AutoBahn










8-cylinder in rear 4-cylinder in rear 4-cylinder in front 4-cylinder in front 6-cylinder in front
air-cooled air-cooled water-cooled water-cooled water-cooled
2968 cc 0986 cc 1158 cc 1299 cc 2968 cc
75 hp 23.5 hp 25.5 hp 32 hp 58 hp
160 km/h 102 km/h 90 km/h 114 km/h 125 km/h
Cw 0.251 Cw 0.385 Cw 0.64 Cw 0.36 Cw 0.36

After the German occupation of CzechoSlovakia in 1939 the Nazis took over control of the Tatra factory and - acting on Hitler's orders - iimmediately stopped the production of the Tatra T97 after a production run of just 510 cars. The reason for this is the close resemblance between the T97 and the German VW KdF-Wagen. Before the war Tatra had ten legal claims against VW for infringement of patents, as VW-designer Ferdinand Porsche had used at least ten Tatra-patents for the design of the KdF-Wagen >>>>>>

The T97's big brother - the V8-powered T87 - did remain in production however in the war years 1939 to 1942. The T87 was a real favourite amongst German officers. Dr Fritz Todt, the German general inspector of the Autobahn network, even proclaimed that the T87 was the ultimate Autobahn car. According to some sources the T87 was said to be CzechoSlovakia's 'secret weapon', as German officers drove them so fast the tail - housing the V8-engine behind the rear axle - would break out in tight corners. It is even said that at one point the German officers were forbidden to drive T87s.

During German occupation Tatra built two prototypes of a T87 convertible in 1940. This car has just two side windows, larger side air scoops and a redesigned rear bonnet to make room for the convertible canvas roof. The rear bonnet has almost completely lost its distinctive tailfin.

Shortly after WW II, in 1946, the British Vauxhall Motors company thouroughly evaluated a T87 from British Intelligence. British Intelligence owned about a dozen T87s for secret missions in Europe involving the captures of Nazi's on the run. The luggage compartment behind the rear seat was used to hide dead bodies of captures and executed Nazi's.



Advertising for the T87 (1938) >>>

 

After W.W.II the Czech writers Zikmund & Hanzelka used a Tatra T87 for extensive travels through the African continent. The T87 was seen as the third member of the team and gave them very reliable and comfortable transport through some of the worst African roads. They wrote a three-part book series about their African travels with the T87, and another six books about further travels using a Tatra T805 small truck. Zikmund & Hanzelka's Tatra T87 has been restored and is now on permanent display in the Technical Museum in Prague.

In the late 1940s Tatra changed the front of the T87. The new front was more bulbous and the headlamps had now been fully integrated in the car. Although it still had three headlamps, there were a few promotion cars with two headlamps. With these modifications the T87 stayed in production until 1950, making a total of 3023 cars to be built including the pre-WW II cars.



<<< After WW II Tatra changed the front of the T87 by integrating the three headlights, these pictures show an alternative version with two headlights (1947)

At the end of the production run of the T87, from the years 1950 to 1953, a small number of T87s were used as test-cars for the newly developed T603 air-cooled V8-engine (later to be used in the T603 aerodynamic saloon of 1955). Not only was a new engine fitted into these cars, but also changes were made to the styling of the T87-603. These changes included chrome striping on the sides (another T603 design feature) and a different rear treatment including a different hood fitted with rear windows!

For a short period in the late 1930's a smaller version of the T87 was available, the Tatra T97. This car was equipped with the world's first air-cooled flat four-cylinder engine with a chain driven single overhead camshaft per cylinder bank. The T97 was ordered to be taken out of production as soon as Germany took over in Czechoslovakia in 1939. The T97 had too big a resemblance to the KdF-Wagen, the later VW Beetle.

The Tatra T87 was Hans Ledwinka's favourite car. He kept driving his own T87 until he donated it to the Deutsches Museum in Munich in April 1965, where it is still on display.






One of only two prototypes of a T87 convertible, built during Nazi occupation, with wartime blinded headlights (1940) >>>

TATRA T87 PRODUCTION FIGURES

EXPORT COUNTRIES FOR THE TATRA T87 *

1936 2 Argentina Germany
1937 5 Australia Hungary
1938 169 Austria Netherlands
1939 446 Belgium Romania
1940 308 + 2 convertibles Brazil South Africa
1941 286 Egypt Soviet Union
1942 110 France Sweden
1945 45
1946 175 * The number of T87s exported per country is unknown
1947 466
1948 700
1949 89
1950 220
Total number 3023

TECHNICAL SPECIFICATIONS




TYPE OF CAR TATRA T87 TATRA T87-T603
Year of production 1936-1950 1950-1953
Number of cars sold 3023 14 (?)
Type of engine 90° V8 petrol engine 90° V8 petrol engine (T603)
Engine cooling air-cooled air-cooled
Location of engine rear rear
Bore x stroke 75 x 84 mm 75 x 72 mm
Cylinder capacity 2968 cc 2545cc
Compression ratio 5,8:1 6,2:1
Maximal revolutions 3500 rpm 5000 rpm
Maximum output 55,2 kW (75HP) 70kW (95hp)
Valve gear OHC OHV
Valves: IO/EO 12º - 15º before TDC -
Valves: IC/EC 55º after BDC -
Valve clearance 0,15 mm 0,15 mm 0,10 mm 0,15 mm
Carburettor dual Solex 30 FFIK, Zenith, Stromberg Jikov 30 SSOP twin-down draft
Ignition battery ignition Bosch 12V battery ignition PAL 12V
Firing order 1, 2, 7, 8, 6, 3, 5, 4 1, 3, 6, 2, 7, 8, 4, 5
Type of clutch dry one-plate clutch dry one-plate clutch
Gearbox mechanical 4-speed mechanical 4-speed
Number of gears 4 + Reverse 4 + Reverse
Synchronised gears - -
Gear ratio 1st 1:4,7 1:4,7
Gear ratio 2nd  1:2,95 1:2,95
Gear ratio 3rd 1:1,56 1:1,56
Gear ratio 4th 1:1,04 1:1,04
Gear ratio reverse 1:5,92 1:5,92
Final drive differential 1:3,15 1:3,15
Front axle swinging parrallelogram swinging parrallelogram
Rear axle swinging axles Tatra swinging axles Tatra
Front suspension 2 transversal leafs 2 transversal leafs
Rear suspension transversal leaf transversal leaf
Rim size: F/R 16"/16" 16"/16"
Tire size: F/R 6,50 x 16" 6,50 x 16"
Petrol consumption 12,2 l/100 km 13 l/100 km
Petrol tank volume 55 l (90 l) 55 l
Oil consumption 0,25 l/100 km -
Oil tank volume 9 l in engine 7,5 l in engine
Brakes hydraulic drum brakes all round hydraulic drum brakes all round
Weight of car 1370 kg 1585 kg
Front track 1250 mm 1250 mm
Rear track 1250 mm 1250 mm
Wheelbase 2850 mm 2850 mm
Overall width 1670 mm 1670 mm
Overall length 4740 mm 4740 mm
Overall heigth 1500 mm 1500 mm
Road clearance 230 mm 230 mm
Maximum speed 160 km/h 172 km/h
Maximum climbing ability 35 - 40 % 40 %
Number of seats 5 5
Body type berline berline

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