The Saab 9-5 might never have gone on sale, had GM’s disposal of the company to Spyker Cars fallen through. But luckily the transaction was completed because, like the Jaguar XF, the 9-5 offers a refreshing alternative to the usual German suspects in the mid-size luxury saloon segment. Now, two months after its launch, Saab is expanding the range with a couple of new engines for the 9-5. The first of these, and probably the one that’ll be of most interest to European buyers, is the 2.0TTiD diesel. Using sequential twin turbochargers, it produces 187 bhp (139 kW / 190 PS), and joins the existing 157 bhp (117 kW / 160 PS) single turbo version in the line-up. Typically for a diesel, the key to the new engine’s performance is torque. And the 2.0TTiD doesn’t disappoint, with 400 Nm on offer from just 1,750 rpm. A 0-62 mph (100 km/h) of ‘under nine seconds’ suggests it’s no rocket ship, but the real benefit of that 187 bhp is probably going to be felt in the mid-range where, in normal...