With the roof up, second row headroom’s a little limited, but both legroom and headroom are good enough for large teenagers and smallish adults. There’s as much room here as in an Audi A5 cabrio.
Shame, then, that Vauxhall/Opel’s interior designers don’t quite have the flair, the ambition – or the budgets – of their counterparts at Audi. The Cascada’s cabin is perfectly functional and the car’s well-equipped, but – in spite of the adoption of a slightly broader colour palette than the Griffin norm – it’s a slightly dowdy, uninspiring fascia to look at.
Equipment levels are generous though, even on the entry-level SE trim. Primarily it features air-con, 18-inch alloys, a DAB tuner, Bluetooth connectivity, cruise control, rear parking sensors, an aux-in port and a USB connection, as well as the OnStar concierge, telematics and wi-fi system. Range-topping Elite models come with additional kit that includes dual-zone climate control, heated electric sports seats with leather trim, wind deflector and automatic lights and wipers.
The Cascada’s suspended via MacPherson struts and a torsion beam – but neither’s an ordinary example of the breed. At the front, the car uses Hiperstrut chassis technology borrowed from Vauxhall’s Insignia VXR, intended to reduce the impact of driving forces on steering precision, while at the rear the Cascada’s Watt’s Link suspension makes for more subtle tuning potential, and a much smoother ride.
Engine options include 138bhp 1.4-litre and and either 168bhp or 197bhp 1.6-litre turbocharged petrols, and just the one diesel, a 163bhp 2.0-litre CDTi. All drive the front wheels through six-speed manual or automatic gearboxes.
For all that promising chassis technology, the Cascada isn’t exciting to drive. It’s geared for relaxed, economical cruising, sprung for comfort and refinement – and it’s quite large and heavy.
All of which means its performance is seldom extraordinary, and its handling is tidy and accurate enough at normal speeds, but lacks grip and poise when you up the Cascada's pace.
But we’d argue that’s exactly as the Vauxhall Cascada should be. Bigger wheels and higher spring rates would likely only illicit flexing and shuddering from the car’s body – which, as it is, seems stiff and robust – and more stressed engines might fall short of the high standards the car sets on economy and mechanical refinement.
The engines are all adequate, but the higher-output motors haul along the Cascada’s bulk more effortlessly. The 163bhp oil-burner seems quiet for a diesel and has plenty of mid-range torque.
The 168bhp 1.6-litre SIDI turbo petrol offers a slightly different blend of talents: even quieter and a bit more willing to rev, it chimes in with a healthy 207lb ft of torque at just 1650rpm. For low-mileage, luxury-minded motorists, it would be the pick of the range.
It may not have the badge appeal of Munich's or Inglostadt's finest, but where the Cascada does win many friends is on the competency front, which we proved when the mid-sized Vauxhall ran the high fancied Audi A5 extremely close to the wire.