The second-generation Jaguar XF has been caught testing on international roads. JLR's mid-size luxury sedan is expected to grow in size to make room in the model range for the hotly anticipated new Jaguar XE, which will slot in below the XF.

The next XF should offer more space and comfort for occupants. As with the XE, JLR's new iQ[Al] aluminium architecture is at the core of the next XF's development. The underpinnings are scalable and company chiefs have previously stated that they will be used for a wide range of vehicles.

That makes it highly likely that Jaguar will pick from the new family of Ingenium engines, such as those installed in the XE, to power the bigger car. The XE will use 2.0-litre, four-cylinder Ingenium units, but the powerplants use fixed 500cc cylinder sizes and so other capacities could be possible. Additionally, the XE will be available with the supercharged V6 engine found in the Jaguar F-type and it seems likely that the XF will receive this too.

The next XF is also likely to adopt the XE's front suspension, which is a sophisticated, lightweight aluminium double-wishbone arrangement.