Like several of its predecessors, the X351 is available in both standard and long-wheelbase form, as well as many special editions. Engines are modern units already seen in other JLR products: the 5.0-litre petrol V8 either normally aspirated or supercharged, or a 3.0-litre diesel twin-turbocharged V6. For 2013, a 3.0-litre supercharged V6 was introduced to the line-up, primarily as an alternative to the diesel unit for improved fuel economy.
The X351 received a minor face lift in 2014, primarily upgrading the suspension and rear seat facilities on the long wheelbase versions, but also introducing small cosmetic changes across the range, and making stop-start technology standard on all engines.
The X351 received another face lift in 2015, adding LED headlights, J-Blade rear taillights, and adding several new driver assistance and safety features such as lane assist, adaptive cruise control with a new feature known as "Queue assist", reverse traffic direction, closing vehicle sensing, a 360 degree camera system, and semi-automated parking features.
The X351 is one of the cars used by the British royal family and an armoured version was used for transporting three former UK Prime Ministers namely David Cameron, Theresa May and Boris Johnson. The Prime Ministerial Car, aside from having classified security measures, has armoured under plates and engine plates.
