The second-generation version of the five-door four-seater Porsche was launched in 2015 and will now gain a new engine and a longer-wheelbase model, as well as more luxurious versions taking the Panamera range to 10 variants.
The 3-litre V6 turbo petrol engine, also used by Audi in its S4 and S5 models, will be supplied in the entry-level Panamera. Matched to an eight-speed PDK double-clutch transmission as standard it offers 330hp, 20hp more than the equivalent in the first-generation model. Fuel efficiency is also improved by up to 13 per cent, to between 35.8 and 37.7mpg.
Rear-wheel-drive models with the new engine will cost from £66,386, those with Porsche Traction Management (PTM) all-wheel drive in the Panamera 4 from £69,412, while it will also be offered with the long-wheelbase Panamera 4 Executive models.
Executive variants add 150mm extra between the wheels and a higher specification that includes a large panoramic roof, heated seats with multi-way powered adjustment in the front and rear, a roll-up rear screen sunblind and the Porsche Active Suspension Management (PASM) adaptive air suspension with an electronically-controlled damper system.
The Panamera 4S Executive, costing from £98,672, and the Turbo Executive (£122,480) also add rear-axle steering and soft-close doors.
Executive buyers can also choose an optional large rear centre console, which can be equipped with two integrated folding tables and an antenna connection for an additional smartphone.
Porsche dealers are now taking orders for the new models that are expected on UK roads early in 2017.