This latest sighting follows a stint of testing on and around the Nürburgring, where one car (shown in our gallery) was seen running with a VXR setup, comprised of larger wheels and dual exhaust tailpipes.
The future Insignia range is said to be larger, lighter and more efficient than the current one; the biggest change is expected to be a small elongation of the car’s wheelbase.
The next Insignia will be a global car, sold under the Vauxhall, Opel and Buick badges across Europe, the US and China. Here in Britain, it will remain a key rival to the Ford Mondeo.
It is believed that the next Insignia is quite a long way from making its public debut; it's not expected to appear until the Paris motor show in the autumn, or potentially the Geneva motor show in March 2017.
These spy shots suggest that the new Insignia will have an evolutionary look, with only minor styling changes to bring it into line with the rest of the Vauxhall range. Although heavy cladding hides the majority of the styling, it has a new swooping roofline, which is higher at the rear, and a wider rear end.
As well as increased rear space and easier access to rear cabin, thanks to the taller doors, the second-generation Insignia will get a bigger and more user-friendly boot. A new tailgate design with redesigned tail-lights will help to make the boot deeper, wider and taller boot than before, with a 565-litre capacity that will match that of the Skoda Superb.
Under its skin, the Insignia is based on a moderately updated version of GM’s familiar Epsilon 2 architecture. In European markets, the most important engine upgrades will be the debut of the new 1.6-litre CDTi diesel in the Insignia, which will replace today’s 2.0 CDTi unit.
General Motors will be targeting best-in-class refinement for the diesel Insignias. The new 1.6 CDTi engine will be offered in a range of outputs, starting at 136bhp and rising to around 170bhp.
Today’s Insignia is already available with GM’s new 1.6 SIDI turbocharged petrol engine in 168bhp form. This engine will also be offered in two lower-powered versions.
The Insignia will be offered with a new eight-speed automatic transmission, which is expected to improve overall fuel economy by around 3% compared with the six-speed manual versions.
Additional reporting by Matthew Griffiths