For the 1985 model year, the BX19 GT (petrol version) became available for the customer requiring a higher performance version of the model. Also in 1985, the BX Leader replaced the BX and BX14 models, the Leader being fitted with the same engine and transmission as the BX14 model.
The BX Estate (Break) was introduced in the second half of 1985, two versions being made available, the BX16 RS Estate and the BX16 TRS Estate. A special edition 4WD rally car, BX 4 TC made its debut together with the twin carburettor BX Sport model.
Changes for the 1987 model year included the introduction of the BX19 GTi (with fuel injection), the BX19 GTi (Soupapes) with 16-valve engine and Motronic fuel injection/ignition system, and the replacement of the BX19 GT by the BX19 TRS. The mark I dashboard made way for the mark II dashboard which saw improvements such as larger front direction indicators and other minor ergonomic changes. ABS is offered as an option.
1988 saw the introduction of the BX Turbo Diesel 1.7 litre with intercooler and ABS. The BX 14 got a new 72 hp engine. In 1989, the BX 4x4 four wheel drive and BX 16 GTi models were introduced.
In early 1990, the BX19 TZi models became available equipped with catalytic converters. The TRS, TRE, TGS, RS, RE models were replaced by TZI, TGI and TGE models.
In late 1992, the BX16 TXi catalytic converter-equipped Saloon and Estate models were added to the range. BX production eventually ceased in 1994, being replaced by the Xantia. Over 2.5 million units were built, making the BX the most popular Citroën ever, second only to the 2CV.
On all models, the engine and transmission unit is mounted transversely and drives the front wheels through two driveshafts. The gearbox available (depending on model) is a four or five-speed manual or a four-speed automatic.
The models are extremely comfortable to ride in, thanks to the hydroneumatic suspension and luxurious interior trim. The unique design suspension is self-levelling and the ride height is maintained automatically over all road conditions. A ground clearance lever inside the car facilitates the variable ride height when travelling over rough ground, and also makes changing a roadwheel much simpler.
The Citroen BX was designed by one of the great Italian styling houses, Bertone. In particular, it was the work of Marcello Gandini who also designed the legendary Lamborghini Countach.