Lancia Delta Evoluzione – rally heritage in its widest form
The first Evoluzione made the Integrale wider, more purposeful and even more closely tied to rallying.
The wheelarches bulge, the bonnet rises and the rear wing signals serious intent. The 1991–1992 Lancia Delta HF Integrale Evoluzione turned an angular family car into a concentrated dose of rally technology – with more extensive changes beneath the skin than its appearance initially suggests.
By Nora LindqvistReporter · Sports cars and motorsportTranslated from Swedish with the help of AI.
From family car to World Championship weapon
The Lancia Delta HF Integrale Evoluzione was unveiled in autumn 1991, with the first version built during 1991–1992. The name Evo I is often used to distinguish it from the Evoluzione II, which arrived in 1993. Here we are looking at the first version, without a catalytic converter in standard European specification, with a turbocharged two-litre engine and permanent four-wheel drive.
The starting point was still Giorgetto Giugiaro’s five-door Delta, launched in 1979: straight lines, a generous glass area and a practical hatchback body. The Evoluzione was not a standalone sports car with a borrowed model designation. It retained the family car’s basic layout, but its body had been adapted for considerably harder work.
The route there ran through the Delta HF 4WD, Integrale and Integrale 16V. Four-wheel drive gave Lancia a competitive tool when Group A became the World Rally Championship’s main category in 1987. The Delta family then won the manufacturers’ championship six years in succession, 1987–1992. That is the entire model family’s winning streak, not six titles for the Evoluzione.
The final title was won with the Evoluzione as the basis for the competition car. Lancia’s direct works programme had ended by then, and the operation continued through Jolly Club with ongoing support from Lancia. The road car provided the basis for homologation: its design laid the foundations for the further-developed rally car.
The extra width had a job to do
Compared with the Integrale 16V, the Evoluzione gained wider front and rear tracks, along with revised suspension. The huge wheelarch extensions made room for the wider stance. The shape was therefore not just a statement to the outside world; it reflected a tangible change to the chassis.
A wider track can reduce lateral load transfer at a given cornering load. This helps the tyres share the work more evenly, although the result also depends on springing, roll stiffness and tyres. For the rally programme, the wider underlying design also offered greater scope to develop the suspension within the regulations.
The bonnet bulge and vents give the front end its characteristic visual weight. The vents help manage heat from the tightly packed engine bay. Above the rear window sits an adjustable spoiler, intended to influence airflow and the car’s aerodynamic balance. No substantiated downforce figures for the road car are given here.
The braking system was also upgraded, with four-piston front callipers. Ventilated front discs dissipate heat under repeated braking, while fixed multi-piston callipers provide a rigid structure around the pads. The standard wheels were still 15 inches – an important detail when distinguishing an early Evoluzione from later versions and modified examples.
More than ten extra horsepower
The transverse four-cylinder engine retained the Integrale 16V’s basic recipe: two litres, twin overhead camshafts, four valves per cylinder and an intercooled turbocharger. Power rose from 200 to 210 metric horsepower. The increase was modest; the Evoluzione’s big step forward lay in the combination of engine, chassis, cooling and brakes.
The turbo forces more air into the engine, while the intercooler lowers the temperature of the compressed air. This allows a greater mass of air into the cylinders, but also places demands on fuel delivery, temperature control and lubrication. On an old Integrale, well-maintained ancillary systems are therefore just as important as the engine block itself.
A five-speed manual gearbox distributes power through permanent four-wheel drive. The basic split is 47 per cent front and 53 per cent rear. The centre differential’s viscous coupling limits rotational speed differences between the axles, and a rear Torsen differential helps distribute drive between the rear wheels. The system lacks today’s electronic torque control, but gives the car several mechanical tools for exploiting grip.
The cabin still reveals its relationship with the everyday car: an upright dashboard, plenty of gauges and a usable rear seat. The deeply bolstered front seats are the most immediate reminder of a different purpose.
Driving and life as a collector’s car
The editorial team has not test-driven the car. Its engineering does, however, make its intentions clear: strong acceleration between corners, traction on varied surfaces and brakes sized for repeated use. Four-wheel drive helps the car accelerate, but does not override the tyres’ limitations under braking.
As a collector’s car, the Evoluzione should be judged on identity and condition before shine. Check the chassis number, documented specification and any changes to engine management, boost pressure and suspension. Original parts and a traceable service history carry considerable weight; a documented restoration is worth more than unsubstantiated claims of original condition.
Have a specialist familiar with the model inspect for rust around the sills, wheelarches, floor and window surrounds, as well as repairs around mounting points. Ask for evidence of timing-belt servicing and check the turbo, cooling system, gearbox and differentials. Uneven panel gaps, cracks and abnormal tyre wear may warrant closer investigation for hard use or accidents. Above all, the widest Delta deserves a narrow shortlist: the right example, not just the right badge.
Sources
- Stellantis Heritage, Lancia Delta HF Integrale
- Graham Robson, Lancia Delta 4x4/Integrale (2010)
- Peter Collins, Lancia Delta HF Integrale: The Story of a Champion (2003)
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