Twin Cam.ie
www.twincam.ie
Opel Astra opc
Road test - October 2006
by Kevin Fenix


Designed for the road, born on the track, is how Opel describe their opc series of cars. It is not an idle boast as the 1998 cc turbocharged petrol engine is tuned to give 88.588 kW/lt, or a massive 177 kW in total. This comes with a diesel like 320 Nm all the way from 2,400 rpm to 5,000 rpm. When you floor that accelerator, the sensation is like a jet fighter being catapulted off the deck of an aircraft carrier. You are pressed with considerable G-force back into your seat and the scenery suddenly becomes a blur. However, as always, with power comes responsibility and you need to know that you have the road ahead and the space to to exploit all that velocity in safety. Top speed is totally irrelevant at 244 kph or 151 mph, as there is nowhere on a public road where you can legally exploit it. However, it is that neck-snapping 0-100 kph in just 6.4 seconds, that you have to be careful of, as it comes up so quickly, that it can catch you unawares. Most drivers are not Michael Schumacher, but this car lets you think that you are, so you have to be constantly on your guard. Based on its Gross Vehicle Weight, its power/weight ratio is 10.396 kg/kW which is very much at the sporty end of the spectrum.


Its exterior styling is nothing if not dramatic and it certainly shouts SPORTS CAR ! loud and clear. While the two large frontal honeycomb mesh grilles are real enough, those around the fog lamps and at the rear, while looking good, are fakes and serve no aerodynamic purpose. They are there for their looks alone. As colour coding seems to be one of the labels of sportiness these days, if you look closely at those attractive alloy wheels, you will notice blue brake callipers lurking behind them. They hug large diameter 321 mm x 28 mm ventilated discs at the front and 278 mm x 10 mm plain discs at the back.
When I floored the accelerator, on dry tarmac, I could feel the front wheels beginning to loose traction. This made me wonder if a car like this should not come with four wheel drive ? Possibly the solution may be to have one of those electronic, torque sensing differentials, found on many SUVs, which can detect slip in the driving wheels and then redistribute some of the torque to the rear wheels, until grip is restored to the front wheels. Opel have access to this technology through General Motors association with Subaru. They use it themselves in the new Opel Antara launched at the Paris Motor Show in September 2006.

If you have a high performance engine, you probably want to show it off to your mates. At least Opel do not hide it under a black plastic acoustic cover. There is not a lot to see, other than the large black plastic pipes running from the air cleaner, turbocharger and intercooler to the inlet manifold, but the cam boxes are finished in silver and are highlighted with a blue band and the opc logo. The underside of the leading edge of the bonnet, where the top pressing is riveted to the underside pressing, has a sharp edge all along its length and this is in very close proximity to the bonnet release catch, so do be careful. Things like the dip stick, oil filler cap, radiator header tank and windscreen washer reservoir, are all clearly marked and easily accessible. Access to the back of the headlamp units, to change a bulb, is another matter altogether. While there are access hatches, they are completely inaccessible, as other equipment like the air cleaner, battery and electrics are all too close behind.
It would be interesting to know the weight distribution of the Astra opc, as there is a lot of equipment under the bonnet, but without a spare wheel, no corresponding mass to balance it at the other end.
The Astra opc has a very basic suspension layout, based on MacPherson struts at the front and a torsion beam with trailing arms at the rear. The spring and damper rates give a firm ride, but the trade off is that the car sticks to curves and corners like glue and combined with the quick steering, with just 2.5 turns from lock to lock, the car delivers a sporty and exhilarating driving experience. That I suspect what opc is all about. Of course, you do not have to exploit all that performance all the time, you can drive it like a normal small car, but why pay all that extra for the opc, when a normal Astra, perhaps with the 1.4 petrol engine, costs a whole lot less.

The opc does cost a lot more than its humbler sisters, but you and more importantly your friends, can see what you are getting for all that extra money. First of all there are those vibrant opc colours ; Arden Blue, Black Sapphire, Flame Red and Star Silver. Then there are the large alloy wheels and black mesh - real and fake - plus the trapezoidal exhaust pipe in the centre of the rear skirt. Open the large door and you see those well bolstered rally style seats, the carbon fibre trim strips on the facia and doors, the analogue instrument faces with blue and white detailing, the alloy pedals and the chunky leather covered steering wheel. Then just in case any of these symbols has not registered with you, the interior is black. Black upholstery, black roof lining, black facia, apart from the silver centre panel and black trim. Now you know it must be sporty, because as everyone knows, Black = Sporty !
There is no denying that those well bolstered seats are comfortable. They do, however, have a major disadvantage, if you happen to carry passengers in the rear seats. While they tip and slide forwards to give easy entry and exit, they do not go back to their pre-set positions, which is a confounded nuisance, as you have to readjust them every time. It is enough to put you off carrying rear passengers at any time. The rear passengers probably feel the same way, as the rear seating area is anything but inviting. Thanks to that black headlining, it is as gloomy and uninviting as a subterranean cave, while the view of the outside world, is practically non-existent.
The seats themselves are comfortable and surprisingly, it is possible to seat three people of normal build side by side. If you are offered a rear seat, volunteer for the centre section, as in that position at least, you get a decent view out through the windscreen. There is also a decent amount of headroom, as although the quarter windows fall away sharply, the roof runs back level, which benefits headroom over the rear seats. The rear seat backrest splits 60/40, so you can carry a lot of equipment like sailboards, etc, in place of rear passengers. The normal boot provides 0.312 cubic metres of covered space, but with the seat folded, this increases to 1.070 cubic metres, when loading to the roof.



If you decide to buy a car like this, it is hardly for use as family transport. If all that luggage space is insufficient for your needs, you can carry up to 75 kg on the roof, but remember, it does not matter where you put it, you are still limited to a gross vehicle weight of 1840 kg. Unlike other models in the Astra range, Opel do not recommend that you use your Astra opc for towing trailers.
The six speed manual gearbox is smooth enough. However, I did not like the button on the front underside of the gear knob, which has to be depressed in order to select reverse. On far too many occasions, when sitting in neutral at traffic lights, when I gripped the knob to shift it into first, when the lights changed, it found its way into reverse, which is embarrassing to say the least. This takes the comfort factor out of driving.

If you buy a car like this, you buy it for its looks and performance, not necessarily in that order. Other things like fuel consumption, warranty and servicing are purely of secondary importance. If you want the exact details they are in the technical data, given below. If things are not in the technical data, it is because Opel were either unable or unwilling to supply them. I asked for them, but without success.
Technical data
Dimensions
Overall length ------------------ 4290 mm
Overall width ------------------- 1753 mm (without mirrors) --------- 2033 mm (with mirrors)
Overall height ------------------ 1435 mm
Wheelbase ----------------------- 2614 mm
Front track ---------------------- 1488 mm
Rear track ----------------------- 1488 mm
Turning circle ------------------ 11.20 M (kerbs)
Unladen weight ---------------- 1393 kg
Gross vehicle weight ---------- 1840 kg
Max. towing weight ------------ Towing not recommended
Max. roof load ----------------- 75 kg
Power/weight ratio ------------ 10.398 kg/kW
Luggage capacity --------------- 0.312 cu.M (seats up) ----------------- 1.070 cu.M (seats folded)
Tank capacity ------------------ 52 lts
Engine
Type ------------------------------ 4 cyl. DOHC 16v turbocharged, intercooled
Capacity ------------------------- 1998 cc
Compression ratio ------------- 8.8 : 1
Max. turbo boost -------------- Not available
Bore x stroke ------------------- 86 mm x 86 mm
Power ---------------------------- 177 kW @ 5,600 rpm ------------------ Specific output -------- 88.588 kW/lt
Torque --------------------------- 320 Nm @ 2,400 - 5,000 rpm -------- Specific torque ------ 160.160 Nm/lt
CO2 emissions ------------------ 221 gm/km ------------------------------ Specific CO2 ---- 110.610 gm/km/lt
Transmission
Type ------------------------------ 6 speed manual
Ratios ---------------------------- Gearbox --------------------------- Overall
1st -------------------------------- 3.82 : 1 ----------------------------------- 13.522 : 1
3rd ------------------------------- 1.43 : 1 -------------------------------------5.062 : 1
4th -------------------------------- 1.07 : 1 -------------------------------------3.787 : 1
5th -------------------------------- 0.88 : 1 -------------------------------------3.115 : 1
6th --------------------------------0.74 : 1 -------------------------------------2.619 : 1
Reverse -------------------------- 3.55 : 1 ----------------------------------- 12.567 : 1
Final drive ----------------------- 3.54 : 1 ----------------------------------- ***********
Suspension
Front ----------------------------- MacPherson strut, L-shaped lower transverse arm, 21 mm anti-roll bar
Rear ------------------------------ C-shaped torsion beam, trailing arms, coil springs, telescopic dampers
Steering
Type ------------------------------ Electro-hydraulic, power assisted, rack and pinion
Turns lock to lock ------------- 2.5
Wheel diameter ---------------- 370 mm
Brakes
Type ------------------------------ Servo assisted, dual circuit, with anti-lock, electronic force distribution, emergency brake assist and cornering brake control
Front ----------------------------- Ventilated disc -------------------------- 321 mm x 28 mm
Rear ------------------------------ Disc --------------------------------------- 278 mm x 10 mm
Wheels
Type ------------------------------ 6 Y-spoke, cast alloy, 5 stud
Size ------------------------------- 8J x 18
Spare ----------------------------- None
Tyres
Type ------------------------------ Continental SportContact 2
Size ------------------------------- 225/40 R 18 ------ 92Y
Spare ----------------------------- None
Performance
Top speed ----------------------- 244 kph ---------------------------------- 151 mph
0-100 kph ----------------------- 6.4 secs
Fuel consumption
Urban ---------------------------- 13.0 lt/100 km ------------------------- 21 mpg
Extra urban --------------------- 7.0 lt/100 km --------------------------- 40 mpg
Combined ----------------------- 9.2 lt/100 km -------------------------- 30 mpg
Warranty/servicing
Coverage ------------------------ 2 years/unlimited, 2 years assistance, 12 years perforation
Service interval ---------------- 30,000 km (18,000 miles)/1 year
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Recommended retail price (excluding delivery and associated charges)
Opel Astra opc 3 dr. ---------------------------------------------------- Euro 33,995 (October 2006)
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