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AUTOMOTIVE NEWS SERVICE
ROAD TEST


COMMODORE SAVES WITH LPG

By EWAN KENNEDY
2 April 2007


Holden's crystal ball wasn’t working too well five years ago when major decisions were being made about the makeup of the new VE Commodore. So 20/20 hindsight has led to many people criticising it for not being a full-on economy model. In particular they say it should have been introduced with a turbo-diesel engine option to cut fuel usage.

It’s all too easy criticise and we may see a turbo-diesel Commodore at some time in the mid-term future (by which time oil prices may have plummeted and no-one would be interested in the diesel…), in the meantime Holden is pushing the LPG versions of its new Commodore lineup. We have just spent a week in the most basic model of all, the VE Commodore Omega with a dual-fuel setup.

Dual-fuel means the engine can run on either LPG or petrol. Interestingly, Ford has taken the opposite route and its E-gas Falcons run purely on LPG. Ford argues that designing an engine to run on two different fuels necessitates compromises.

Holden replies that while this is true its engineers have minimised the problems. Certainly the numbers look good on the Holden Alloytec engine, peak power and torque are down by just five kilowatts and five Newton metres respectively.

On the road the differences feel negligible and you have to glance across to the console-mounted switch to check which fuel the car’s running on. However, the Commodore we tested had an intermittent idling problem when running on gas. Sometimes it was as smooth and quiet as you could wish for, at other times it ran fast and hunted up and down through about 200 revs in an irritating manner. This roughness came at random and didn’t appear to be connected to atmospheric conditions or engine temperature.

Fuel consumption is substantially higher with LPG than petrol, typically in the 30 to 40 per cent range. Realistically the VE Commodore can run for about 300 to 350 kilometres on a 73-litre gas tank. The petrol tank also holds 73 litres, but it’s possible to get over 600 km from petrol. Using the two tanks means that 1000 km is within your grasp on a country run.

LPG usually retails for about half the price of petrol. You spend $3900 extra to buy an LPG engine in a Commodore, but the government’s $2000 rebate is a big incentive.

Holden has come up with an exceptional, dynamic package in the VE Commodore. Making it a car that feels right up with European cars costing more than twice the price. Handling and road grip are sensationally good and most drivers will corner at speeds that are a long way inside the cars limits. And should you still manage to get it wrong the standard ESP system (used on all versions including the gas conversions) will do everything it can to get you out of trouble. It’s almost completely neutral in its balance and steering feel in normal road driving and there are large reserves of safety.

Should you make a mistake and enter a corner at way above your intended speed the Holden ESP (electronic stability program), which is standard on all models, will assist you in keeping the Commodore safely on track. But only up to a point, because physics will always win in the end so don’t expect miracles if you do something really stupid.

And if you do have a big crash the Holden's passive safety features, including airbags will try to help you survive.

Ride comfort is very good despite the sporty handling ability. Holden continues to show prestige European car makers how tyre and road noise can be suppressed on coarse-chip surfaces. It makes almost no difference what the road surface is like, there's little increase of sound and vibration levels inside the cabin.

Our biggest complaints with the VE Commodore are the fiddly operation of the handbrake, and the very large A-pillars. The latter can hinder vision to the extent of being dangerous at times. They are, of course, there to strengthen the car in a crash, particularly in a rollover, but if they can cause a crash in the first place…

These are spacious cars with plenty of space for four adults, five without too much compromise, though the central tunnel in the floor takes up a fair bit of foot space in the centre-rear seating position.

The boot is positively cavernous and even with the LPG storage cylinder sitting at its front is still capable of carrying several large suitcases, with plenty of room for smaller items around them.

Holden Commodores running on LPG are a handy compromise that can significantly cut fuel costs and give an extra large cruising range. They are certainly worth adding to your list of potential large family cars.

The gas conversion is available not only on the VE Commodore Omega sedan as tested, but also on the VE Berlina. It is offered on the station wagon and utility bodies, but keep in mind that these are still the old VZ series as the new VE Commodore body has yet to be extended to them.

AT A GLANCE

MODEL RANGE (LPG ONLY)
VE Omega LPG 3.6-litre four-door sedan - $38,390
VE V-Series LPG 3.6-litre four-door sedan - $38,890
VE Berlina LPG 3.6-litre four-door sedan - $43,890
VZ Executive LPG 3.6-litre five-door wagon - $41,110
VZ Acclaim LPG 3.6-litre five-door wagon - $46,910
VZ Ute LPG 3.6-litre two-door utility - $32,890

FEATURES
ABS Brakes: Standard in all models
Air Conditioning: $2000 option in Omega, $2250 option in VZ Executive and VZ Ute, standard in other models
Automatic Transmission: Standard in all models
CD Player: Standard in all models
Central Locking: Standard in all models
Cruise Control: Standard in all models
Driver Airbag: Standard in all models
Passenger Airbag: Standard in all models
Front Side Airbags: Package option in Omega, VZ Executive and VZ Ute, standard in other models

SPECIFICATIONS (Holden Commodore Omega 3.6-litre LPG four-door sedan)

ENGINE:
Capacity: 3.564 litres
Configuration: V6
Head Design: DOHC, four valves per cylinder
Compression Ratio: 10.2:1
Bore/Stroke: 94.0 x 85.6mm
Maximum Power: 175 kW @ 6000 rpm
Maximum Torque: 325 Nm @ 2600 rpm

DRIVELINE:
Driven Wheels: Rear
Manual Transmission: Not offered
Automatic Transmission: Four-speed
Final Drive Ratio: 3.27:1

DIMENSIONS, WEIGHT AND CAPACITIES:
Length: 4894mm
Wheelbase: 2915mm
Width: 1899mm
Height: 1476mm
Turning Circle: 11.4 metres
Kerb Mass: 1690kg
Fuel Tank Capacity: 73 litres
Towing Ability: Up to 2100kg with approved towing equipment

SUSPENSION AND BRAKES:
Front Suspension: MacPherson strut, progressive rate coil springs, direct acting stabiliser bar
Rear Suspension: Multi-link independent, progressive rate coil springs, stabiliser bar
Front Brakes: Ventilated disc
Rear Brakes: Ventilated disc

PERFORMANCE:
0-100 km/h Acceleration: NA
Standing 400 Metres: NA

FUEL CONSUMPTION:
Fuel Type: Petrol 91RON/LPG
Fuel Consumption - Combined Cycle (ADR 81/01): 16.0 L/100km

STANDARD WARRANTY:
Three years/ 100,000km

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