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This is the Vauxhall Insignia 2.0 CDTi 160 Exclusiv. We’ll get straight to the point with this one, with the combination of generous-yet-cheap Exclusiv spec and the most powerful diesel engine, this is the real sweet spot in the Insignia range.

With 158bhp and 258lb ft of torque on tap, the Insignia CDTi 160 delivers 30bhp and 37lb ft more than the entry-level CDTi 130, and yet consumes identical amounts of fuel (an impressive 48.7mpg on the combined cycle), and...Read the full article

Looks OK, but not sure you should be referring to 48.7mpg as "impressive" because it isn't.  For instance, a BMW 123d coupe weighs more or less the same at 1495kg but has 204bhp and does 54.3mpg.  OK the Vauxhall's going to have a bigger frontal area but that hardly accounts for the difference.  A reasonable effort is perhaps as good as you could put it.

Agreed. The Insignia is also costly to tax and is an ugly beast to boot. New name or not, vastly improved or not, it's still Vauxhall's banal fleet model. People are only going to assume you're a 'sales technician' if you buy one.

nicfaz:

a BMW 123d coupe weighs more or less the same at 1495kg but has 204bhp and does 54.3mpg

True enough, but a 123d coupé is hardly suitably for a family of four plus luggage. It also costs the small matter of some £8k more than the Vauxhall. And anyway, perhaps you could say the the Insignia's fuel consumption is impressive, and the BMW's astounding...

That BMW engine is amazing, especially in an Alpina D3...

 

Matt Rigby:

And anyway, perhaps you could say the the Insignia's fuel consumption is impressive, and the BMW's astounding...

I'm just wary of praising Vauxhall (or any manufacturer) for what isn't much more than an average effort - they should be doing better and all models should include the kinds of economy saving measures that help BMWs achieve such impressive figures.  I'm not sure the new version of 'economy specials' like the Skoda Superb Greenline help either, yes I want 55mpg but not when it comes coupled with 104bhp in a big car and long run-ups to overtake tractors...

 I guess I'm suffering from BMWitis, which means I think BMWs are somewhat overpriced and I really don't like the styling, but I very much wish that their engines were available in other cars!  There are lots of cars that would be significantly improved by having the 123d's engine in them.  Can you imagine an Alfa Brera with a diet, a RWD conversion and a selection of BMW engines?!

nicfaz:

I'm just wary of praising Vauxhall (or any manufacturer) for what isn't much more than an average effort - they should be doing better and all models should include the kinds of economy saving measures that help BMWs achieve such impressive figures. 

Good point.

Plus, the 48.7 mpg combined cycle claim by Vauxhall is unlikely to ever be achieved. Why? Unlike BMW and Toyota (Prius), the blobby VecSignia doesn't even bother with a stop/start system. Some nice pretend wood on the dashboard though.

Pull up to a halt in a BMW with stop/start, or in the Prius and the engine stops. Saves a ton of fuel every year. The Prius goes one better by switching off the engine whenever the car is coasting (i.e. your foot's off the gas).

I'm just gobsmacked that other manufacturers don't offer cars that stop the engine when the engine isn't needed. In no way are they remotely serious about saving fuel or cutting the cost of motoring if they don't offer this kind of stuff. And it's not even new stuff - VW offered Formel E versions of its cars in the last century...

Yes, the BMW diesels have been delivering the most efficient range of engines for a long time, to the extent that I wonder if their higher state of tune is solely attributable to consistently superior design or by compromising on durability and longevity?

It is still not so long ago that there was the Micasil bore problem and that still has to be guarded against on some used models.

It would be interesting to learn from user statistics if my misgiving has any substance because it seems odd that no other maker can emulate these performances when they surely have at least ample opportunity to reproduce the same characteristics in their own designs if they wish?