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Originally Posted by RedNeck383
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Not exactly...
In 1994 Opel brought out the brand new Omega B that replaced both the Record and Senator models and ended the inline 6 engines for Opel, using a new V6 and I4 engines (It was also sold in the US as the Cadillac Catera). Again Holden decided to save money by using the wind tunnel tested and developed ‘shape’ of the new Opel. But it again had to widen it. This resulted in the new 1997 VT Commodore using a stylized copy of the now 3 year old Opel Omega. But again locally designed suspension and other locally sourced parts had to carry over into the new design. Again, only the doors were to be shared with the Opel, as well as a strengthened and modified copy of it’s independent rear suspension (which had been reengineered into a unique Holden version during the previous body) was used. However, as the body team worked on the style of the new VT Commodore (from which the Monaro/GTO was later engineered), even the rear door skins and glass were reshaped and so only the front doors were common with the Opel Omega B/Cadillac Catera. And of course the Holden Commodore now used the Buick 3.8 pushrod motor (with and without supercharger) and the Chevy Corvette LS1 engines matched to locally designed and sourced drivetrains and brakes etc. This also required a totally unique floorpan and framework than the narrower and lighter Opel/Catera.
To reaffirm that the Commodore / GTO and Omega are two different engineering products, you can visually see that the Commodore is a much wider and bigger vehicle than the Omega. And look at things like the roof of each car. Note that the Omega’s roof is a single pressing while the Commodore has a three-piece pressing. Given that the passenger cell is a major frame component in a monocoque design - this is a significant difference on it’s own. But also follow the carriage line under the side windows forward to where they intersect the front. Note how this virtually straight line sweeps over the top of the Omega headlights yet intersects the side blinkers on the Commodore. And the bonnet shut lines on the Commodore are more inboard than the Omega’s. This is because the entire shape of the front and even the substructure in the Commodore are different And underneath is even more different. A car needing to carry a heavy cast iron 5.0 and 5.7 Holden V8 (and then the 5.7 LS1) has to have a different frame from a vehicle that uses 4 cylinder engines and whose heaviest engine is an alloy 3.0 V6.