THE Outlander PHEV has been a huge success since its launch - and Mitsubishi seems determined to keep improving its popular plug-in hybrid to keep the opposition at arm’s length.

It’s already the best-selling plug-in electric vehicle in the UK, but that hasn’t dimmed the desire to keep subtly enhancing its appeal.

Incredibly low emissions and running costs come courtesy of a clever powertrain which combines a 2.0-litre petrol engine with a pair of 60kw electric motors.

The battery can be charged from a normal domestic socket or a rapid charger, with the vehicle able to travel around 30 miles on electric power, depending how eager the driver is with the accelerator pedal.

Although those with short commutes may be able to make it to their destination without troubling the petrol engine, the reality is that most people will use a combination of both power sources.

Since I tested an early version of the Outlander PHEV three years ago, there’s no doubt that the battery now offers much stronger and more sprightly performance.

When the petrol motor takes over, the performance remains strong and the car can go from 0-62mph in 11 seconds - not blistering but quite adequate for a sizeable vehicle that’s more tailored towards a smoother and relaxed driving style.

The transition is so smooth from electric to petrol power that you barely notice the changeover in terms of noise or performance.

Furthermore, while driving, the petrol engine can be charging the batteries ready for electric power to take over when desired, while regenerative braking will also give your batteries a boost.

The handling is trustworthy and the PHEV feels relatively nimble considering its bulk.

There’s also bags of torque when emerging from slippery corners, with the vehicle feeling sure-footed in most situations.

There have been a number of other subtle improvements, including the fact that the front and rear shock absorbers have been revised to improve its low-speed ride.

Meanwhile, another update to the very latest model is a new ‘Sport Mode’ which provides sharper throttle responsiveness and even more grip via the excellent all-wheel control system.

In terms of looks, there’s nothing about the PHEV that screams ‘hybrid’ or ‘part electric vehicle.’

Indeed, it looks much the same as the standard Outlander - purposeful, smart, slightly boxy and a little rugged.

At the front, the recently-updated new grille and the sharper angles herald an improvement on the previous front end.

The vehicle’s simple shape - effectively two large slabs - helps when it comes to practicality, with plenty of interior space available, including a 463-litre boot capable of swallowing most items you could reasonably want to throw its way.

Once inside, the cabin feels solid, spacious and very well put-together, with no shortage of legroom for all occupants and bags of kit.

There are several new safety features too with the Forward Collision Mitigation system now featuring Pedestrian Detection.

Meanwhile, the Rear Cross Traffic alert system and the Blind Spot monitoring are handy features on a vehicle of this size.

Blind Spot Warning and Rear Cross Traffic are useful features in a car this size, though to be fair the Outlander has great all-round visibility.

It feels exceptionally well put together and is characterised by a feel that combines rugged elements with creature comforts.

In terms of the costs of purchase, the price tag is helped by the £2,500 Government grant for plug-in hybrids.

If you mostly drive in an urban environment, have a charger easily available and seldom exceed the Outlander PHEV’s electric vehicle driving range, this vehicle is a tantalising option.