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Thread: Isdera Commendatore 112i Prototype 1993

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    Isdera Commendatore 112i Prototype 1993

    The Isdera Commendatore 112i is a concept car conceived and developed by the German low volume automobile manufacturer Isdera. Introduced at the 1993 Frankfurt Motor Show, the 112i had a compact and sleek aerodynamic body work and was to be a successor to the Imperator 108i but the lack of financial reserves led the company into bankruptcy and only one prototype was completed. A second car was built in 1999 and was sold to a Swiss businessman.

    History and development
    After the Imperator 108i had ended production in 1993, Isdera was working on the development of a new model. In 1989, the first clay models took shape and development work was carried out through 1993. The new car called the Commendatore 112i was named in honour of Enzo Ferrari (Ferrari was awarded the title Commendatore II). Commendatore means Knight Commander in Italian language.
    The sleek design drew inspiration from the famous Group C race cars. Eberhard Schultz, the company's founder, engaged engineers and technicians from Mercedes-Benz with approval from the company in the development of the car.

    The 112i had a 6-speed manual transmission built by Getrag—transferring power to the rear wheels—which was shared with the Porsche 911 Turbo, the ABS brakes (which measured 330 mm (13 in) and the front and 305 mm (12 in) at the rear) and the suspension system were shared with the Porsche 928 while the head lamps were shared with the Porsche 968. The car has handbuilt body work on a tubular steel spaceframe chassis and has 18-inch gold BBS alloy wheels wrapped in tyres measuring 255/35 ZR18 at the front and 295/35 ZR19 at the rear. The large side intakes help cool the engine.
    The engine was a 6.0-litre Mercedes-Benz M120 V12 unit (first used in the Mercedes-Benz C112 and later used in the Mercedes-Benz SL600 AMG and the Pagani Zonda S). It was especially modified to cope with the manual transmission. The modifications included an in-house developed flywheel and a Bosch ECU. The engine generated a maximum power output of 414 PS (304 kW; 408 hp) at 5,200 rpm and 580 N⋅m (428 lb⋅ft) of torque at 3,800 rpm.

    The 112i had advanced technologies at the time, including gull-wing doors, a gull-wing engine cover for easier access to the engine, a velocity sensitive chassis which lowered the car by 76 mm (3 in) at high speeds, an active suspension system and an electronically controlled airbrake. The 112i retained the periscope rear view mirror from the Imperator 108i instead of conventional side view mirrors. It has a flat underbody and the windshield wiper from a bullet train for improved aerodynamics. The long tail of the car also improved airflow over it. The airbrake raised in an upright position while braking acting as a wind deflector to help slow the car down (similar to a parachute). The car had a drag coefficient of Cd=0.306 when tested in the Mercedes-Benz wind tunnel.

    The interior of the car was mostly custom made and contained two tone blue and black leather upholstery along with RECARO leather sports seats. The car had wide door sills which housed the two fuel tanks. The dials and other instrumentation (excluding the steering wheel which was from OMP) were from Mercedes-Benz and the speedometer read up to 400 km/h (249 mph).
    Isdera planned a limited production run of the 112i like its predecessor and quoted that each car would take six months to complete. The car was not functional when it was introduced. The development of the car reportedly cost a total of €4,000,000. This combined with the ongoing economic recession pushed the company into bankruptcy shortly after the car's introduction. The company was then bought by Swiss investors under whom Schultz completed the car in order to make it driveable on the road.

    Six years later, another fully functional car was produced based on the Commendatore 112i and was called the "Silver Arrow". On the exterior, the car had conventional side view mirrors and had silver five-spoke Mercedes-Benz alloy wheels instead of the gold BBS units. The engine was a 6.9-litre Mercedes M120 V12 unit, which generated a total of 619 PS (455 kW; 611 hp). Interestingly, there was no Isdera badging on the car and it had Mercedes-Benz badging instead. The Silver Arrow was unveiled at the 1999 Frankfurt Motor Show.

    Performance
    The 112i was claimed to accelerate to 100 km/h (62 mph) in 4.7 seconds and having a top speed of 341 km/h (212 mph). The Silver Arrow was claimed to have a top speed of 370 km/h (230 mph) during testing.

    Later use
    The Silver Arrow was bought by Swiss businessman Albert Klöti at a price of €1,500,000. Albert kept the car for 5 years after offering it on eBay for sale for US$3,000,000 in 2005. The car failed to sell after which it was sold again in 2010. The original Commendatore 112i was kept by Isdera and makes appearances at motor shows.

    Other media
    The Commendatore 112i was featured in the 1997 Electronic Arts racing video game Need for Speed II. The Silver Arrow was featured in a short documentary on Albert Klöti.

    Source: Wikipedia

    Specs
    Powertrain Layout Mid Engine / RWD

    Dimensions
    WheelBase 2600 mm / 102.4 in
    Length 4665 mm / 183.7 in
    Height 1040 mm / 40.9 in
    Width 1885 mm / 74.2 in
    Weight 1480 kg / 3263 lbs
    Front / Rear Track F 1550 mm / 61.0 in
    R 1550 mm / 61.0 in

    Engine
    Configuration Mercedes V12
    Valvetrain 4 valves / cylinder
    Displacement 5987 cc / 365.3 cu in
    Power 304.3 kw / 408.0 bhp @ 5200 rpm
    Torque 580.0 nm / 427.8 ft lbs @ 3600 rpm
    Bore 89.0 mm / 3.5 in
    Stroke 80.2 mm / 3.16 in
    Compression Ratio Not Available
    BHP / Liter 68.15 bhp
    Redline 6200 rpm

    Transmission
    Type 6-Speed Manual

    Top Speed 212.0 mph / 341.2 kph
    0 - 60 mph 4.7 seconds

    Source: unknown
    Attached Images Attached Images
    Last edited by Man of Steel; 11-04-2019 at 04:07 PM.
    I am easily satisfied with the very best.

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  2. #2
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    400 hp and 212 mph top speed?

    Seems these are a bit too optimistic...
    Minimising losses can maximise net gains

  3. #3
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    a Yaris for example does half that with 85HP....
    I dont think theres a formula for how much HP you need to reach 200, its a very complex matter involving too many variables
    I am easily satisfied with the very best.

    "It is a very good looking car, If you have cataract" - JC about the Alpine A610

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    I read article about Isdera in mid 90's and it said that owner of Isdera is such a patriotic German that all the parts in all Isdera's are made in germany.

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    Quote Originally Posted by ErWin76 View Post
    I read article about Isdera in mid 90's and it said that owner of Isdera is such a patriotic German that all the parts in all Isdera's are made in germany.
    This could explain why it looks like a Porsche.

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    Gt1Street, I had to change my book today... I couldn't fit any more plusses and stars in the old one under your name. You'll get an A in Hide-Out Moderating!
    Thanks a lot

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    Quote Originally Posted by ScionDriver View Post
    This could explain why it looks like a Porsche.
    It doesn't look much like a Porsche does it?

    Except for the front perhaps.
    Lack of charisma can be fatal.
    Visca Catalunya!

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    i think it uses the 928 headlamps

    Quote Originally Posted by lightweight View Post
    400 hp and 212 mph top speed?

    Seems these are a bit too optimistic...
    it might have used high gearing

  9. #9
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    Quote Originally Posted by Ferrer View Post
    It doesn't look much like a Porsche does it?

    Except for the front perhaps.
    It does to me anyway, especially the front.

  10. #10
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    Isdera Commendatore 112i #2
    Last edited by Man of Steel; 11-04-2019 at 04:01 PM.

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