Opel Manta A series Fact File

Produced From: 1970 - 1975                                           

Total Number Produced: 498 553  

UK Specifications (1971)

Models types available in the UK

Deluxe: the base model
Rallye & SR: for the sporty driver
Berlinetta: for luxury & comfort
Luxus: a limited edition model
Turbo: for phenomenal performance                                                      click link below for colour chart

Model types available in Europe                                                                    Colours

1.2, 1.6 & 1.9 litre engines and many variations of trim
GT/E with fuel injected engine & lowered suspension
TE 2800 a Commodore engine powered monster

Opel Manta A: Space with Style -

It is possible to draw many parallels between the Opel Manta and the Ford Capri. Yet Opel insisted that their car was not introduced as a Capri competitor. Opel pointed out that they were already producing four ranges of conventional saloons. They had already introduced one specialised vehicle, the Opel GT which was an attempt to cover one part of the market, that had been missed by other ranges, the Manta grew up along the same lines.

It is true to say, then, that the Manta is the result of the same market research findings as Ford’s: that there was a demand for more than a box on wheels, a really well styled car of compact size offering a high standard of comfort and equipment.

Styling

The Manta was styled under the direction of Chuck Jordan before he left Opel for America. It owes nothing to any previous model and there are no pressings in common with anything else in the range.

As far as the body is concerned, it was a new car from the ground up.

The wheelbase is only slightly bigger than the Kadett (five inches less than a Capri’s), yet the front and rear track is increased by nearly three inches, matching the Capri very closely. It is an inch longer, an inch narrower and two inches higher.

The Manta nose is styled around four small circular headlamps. The nose is relatively short and the bonnet front hinged. Side treatment is very restrained, only a minimum of trim to interrupt the smooth flow of the surface. The lower waistline and the extra overall height has resulted in a large window area. The front drip rails (though not the roofline gutters) have been eliminated to reduce wind noise. For the same reason there are no quarter lights in the doors.

The rear styling is a full fastback, finishing in a slightly upswept spoiler type tail. The object was to provide reasonable back seat space and the largest possible boot.

Engineering

The Manta was given its preview at the Paris Show in September 1970, initially in three variations: the base model, Manta Deluxe (L) and Manta Rallye (SR). Only the last two sold in the UK. There are three engine options, two 1.6 litre units of 68 and 80 bhp (which was a new engine only offered in the Manta and Ascona) and a 1.9 litre engine with 90 bhp. The base car came with either 1.6 litre unit, the L can have either of the three and the SR can have either of the top two units. All had five bearing crankshafts, with overhead valves operated by a chain driven camshaft mounted in the cylinder head instead of the block.

Later, in Europe, the 1.2 litre OHV Kadett engine was also available but (thankfully) it wasn’t sold in the UK. Most of the driveline components were derived from contemporary Opel units. For example, the gear ratios (manual) were the same as those on the Rekord Sprint at 3.67:1 final drive.

The brakes were also from the Rekord. Front suspension was new, using double wishbones and coil springs and they had rack and pinion steering. At the rear was a live axle, trailing arms and a panhard rod and progressive rate coil springs.

GM Strasbourg automatic transmission was available as an alternative to the standard four-speed manual, but only with the 1.9 and 1.6S units. The transmission choice is basically down to what you prefer as they are both good, the automatic being more lively than you would expect.

Manta SR/Rallye

The SR package is a very desirable item as this includes a much higher spec: full instruments, sports wheels, 1.9 engine, etc. Early SRs, or Rallyes as they were called, very often had blacked out bonnets and Rallye stripes. Furthermore instead of Rostyle type wheels, Rallyes had hub type sports wheels very similar to that on the Opel GT.

Manta Berlinetta

Another additional Manta version introduced in October 1972 was the Berlinetta. It had the 1.9S engine with vinyl roof, sunroof (Webasto or steel), nylon cloth upholstery, sports wheels, headrests, driver’s door mirror, rubber strips on the bumper, and a rev counter instead of a clock.

Manta Luxus

In March 1974, a model called the Luxus was introduced, featuring a vinyl roof, sliding sunroof, nylon cloth upholstery, sports wheels, headrests, driver’s door mirror, the 1.9S engine and was finished in Signal Red. Four hundred were produced (along with 400 four door Asconas in Signal Blue).

Manta GT/E

The fuel injected GT/E A series was never produced in RHD form so was not sold in Britain.

Turbo Power

Probably the most exciting model was the Turbo Manta, which appeared in October 1974. This was a Berlinetta model with the 1.9 carburettor engine with a Holset turbocharger and manual or automatic transmission. A limited slip differential was also an option.

The cars (28 were built) were modified by Broadspeed in conjunction with the Dealer Opel Team and built for the RHD UK market. The Turbo Manta was black with a large front air dam and silver coachlines and small "turbo" lettering on the rear quarters. They all had maroon cloth interiors and a turbo boost gauge replaced the clock.

Identifying Features

• Only available in Black
• Front spoiler
• 1900cc engine with low compression pistons, heavy duty valve springs and special head gasket
• Holset turbo charger and special manifolds
• Modified Solex carburettor in special plenum chamber
• Boost gauge in place of pod mounted clock
• Modified exhaust system
• Heavy duty clutch
• Burgundy colour coded velour interior with immitation wood capings on the door and rear quarters
• Burgundy colour coded headlining
• Burgundy colour coded carpet
• Burgundy boot carpet
• Black vinyl roof
• Full width rubber inserts on front and rear bumpers
• Sports steering wheel
• Dashboard tachometer (rev counter)
• Pod above centre console with oil pressure, boost pressure and ammeter gauges
• H1 Halogen headlamps
• Headlamp washers and wipers
• 13 x 6J Alluminium alloy sports wheels
• 185/70HR 13 tyres
• "Berlinetta" script badge on front wings
• "1900" badge on front wings
• "Turbo" decals on rear wings
• 3.44 - 1.00 rear axle
  

TE2800 Manta

As the 6 cylinder engine is longer than the 4 cylinder version, it was necessary to remove the panel which supports the radiator and install a U-shaped tubular crossmember into the engine bay.
It was also necessary to hammer out a slight recess to the rear of the engine to allow room for the larger gearbox

In order to maintain weight distribution with the heavier engine the following changes were made:

• The bonnet was replaced with a lightweight fiberglass item.
• A spoiler shaped front valence with built in bumper was installed.
• The battery was relocated to the boot.

To cope with the extra power the following modifications were carried out:

• The front springs were replaced with stiffer items.
• Uprated shock absorbers were installed.
• Ventillated front disk brakes were installed.
• Wide alloy wheels and larger tyres were fitted, to cover these, flared wheel arch panels were installed.
  

A Nardi steering wheel and Recaro reclining seats replaced the usual items.

With 142bhp on tap, 0-60 mph took 7.6 seconds and 0-100 mph took 22.2 seconds the claimed top speed was 128.5 mph.

Identifying Features

• Integrated front spoiler and front bumper
• Fiberglass bonnet
• Wheel arch extensions
• 2800cc 142 bhp 6 cylinder engine with twin carburettors
• Optional 2800cc 230 bhp 6 cylinder engine with triple carburettors
• Larger gearbox
• Optional 5 speed ZF gearbox
• U-shaped tubular crossmember replaces radiator support on front valence
• Ventilated front disk brakes
• Stiffer front springs
• Uprated shock absorbers
• Nardi steering wheel
• Recaro reclining seats
• Commodore GS Dashboard tachometer (rev counter)
• Commodore GS Dashboard speedometer
• 13 x 7J Light alloy sports wheels
• 195/70HR 13 tyres
• "TE" badge on front grill
• 3.18 - 1.00 limited slip differential rear axle
• Optional 3.44 - 1.00 limited slip differential rear axle
• Optional 3.67 - 1.00 limited slip differential rear axle
• Battery located in the boot