A wide array of different model types were offered during the life of the Phase 1 model, including Genoa, XSS, XT, XRdt and XLd. Various 'performance' models were added later, such as the S16, XSi and GTI-6 (petrol) and the D-Turbo S (diesel).
All variants of the 306, with the exception of the GTI-6 and cabriolet models, were priced very competitively.
Petrol engines
The initial petrol engines used were proven four-cylinder units, which had gained a solid reputation in Peugeot models such as the 205, 309 and 405. At first, all mainstream models were powered by derivatives of the TU series 8-valve engine, in 1.1-, 1.4- and 1.6-litre guises. The 1.1 was dropped quickly, but the 1.4 and particularly the 1.6 variants sold well, the latter offering a balance between performance and economy.[6]
Three larger-capacity units were available, but restricted to automatic and performance models. These engines were developments of the larger XU series units which had been used in the 205 GTi 1.9, and larger 405 models. A 1.8-litre version powered cars with both manual (not many 1.8 manuals were produced) and automatic transmission, while two versions of the 2.0-litre engine in 8- and 16-valve guises powered the XSi and S16 models respectively. In Australia, the only engines available were the 1.8 and 2.0 L engines.
Diesel engines
Peugeot had an excellent reputation for its diesel engines,[7] and the 306 was originally offered with the XUD series diesel engine in both normally aspirated and turbocharged forms. This engine was initially a 1769 cc unit, but its capacity was soon enlarged to 1905 cc. The Indirect Injection XUD Diesel that uses the Ricardo Comet combustion chamber design, is popular for conversion to run on vegetable oil, as long as the Bosch Fuel System is fitted to the engine.[8]
Chassis design
The familiar range of PSA powertrains drove the front wheels of a conventionally designed chassis. At the front was a standard MacPherson strut layout with anti-roll bar, while the rear used the PSA Peugeot-Citroën independent trailing arm/torsion bar set up that was first introduced on the Peugeot 305 estate. However, PSA's chassis engineers employed some unusual features, including passive rear wheel steering, though less than on the ZX, (by means of specially designed compliance bushes in the rear suspension), and in-house developed and constructed shock absorbers. At high mileages this is prone to wear of the axle mounting bushes which is easily fixed. It is also prone to wear in the rear axle trailing arm bearings, which then wear the trailing arm axle tubes, requiring an expensive rebuild or a replacement axle assembly.[9][10][11][12][13] The diesel and larger capacity petrol engines are canted as far back as possible in the engine bay, in an effort to put as much weight as possible behind the front axle line, also reducing the centre of gravity, while improving weight distribution and minimising
Versions
Trim levels were XN, XL, XR, XT and XS; XN being the most basic, and XT the highest specification. The XT was available in 5-door only, with the XR, XN and XL available in 3-door too. The D-Turbo and XSi were available in both 3- and 5-door, the XS and S16 only available in 3-door. There were no longer "X/G" designations ("X" indicating a 3-door, "G" indicating a 5-door). A diesel model could be identified with the addition of "d" after the spec level, and a turbodiesel with the addition of "dt". There were special edition versions too, badged "Alpine" from 1994. (3-door only).
Sedan models
The sedan specification was marked as SN, SL, SR, and ST.
Peugeot created a D-Turbo "hot hatch" version, which was essentially a petrol XS model with the diesel unit installed. The 306 was not the first mainstream affordable performance diesel, with that plaudit arguably going to the MkII VW Golf GTD of the mid-1980s. Most D-Turbo cars were 3 door models, but there are a few rare examples of the 5-door D-Turbo.
The D-Turbo and XS variants were fitted as standard with front fog lights, body-coloured bumpers with deeper spoilers, sports seats and different steering wheel, and a wider, chromed exhaust tailpipe; 14-inch alloy wheels were an optional extra. The models fitted somewhere between the XR and XT variants in terms of standard equipment.
The XSi 8v 2.0 Petrol had the addition of subtle side skirts. 15-inch five spoke alloy wheels were available as an option when the model was launched, and became standard shortly after.
Sedan models
The sedan specification was marked as SN, SL, SR, and ST.
Peugeot created a D-Turbo "hot hatch" version, which was essentially a petrol XS model with the diesel unit installed. The 306 was not the first mainstream affordable performance diesel, with that plaudit arguably going to the MkII VW Golf GTD of the mid-1980s. Most D-Turbo cars were 3 door models, but there are a few rare examples of the 5-door D-Turbo.
The D-Turbo and XS variants were fitted as standard with front fog lights, body-coloured bumpers with deeper spoilers, sports seats and different steering wheel, and a wider, chromed exhaust tailpipe; 14-inch alloy wheels were an optional extra. The models fitted somewhere between the XR and XT variants in terms of standard equipment.
The XSi 8v 2.0 Petrol had the addition of subtle side skirts. 15-inch five spoke alloy wheels were available as an option when the model was launched, and became standard shortly after.
The S16 (for 'soupape-16', or '16-valve') was a 3-door Phase 1-only model, replaced with the more powerful GTI-6 in 1996. The engines in both cars were 16-valve XU-series units with Magneti Marelli fuel injection. As well as gaining a close-ratio 6-speed gearbox over the S16's 5-speed, the GTI-6 had more power courtesy of a reworked 167 bhp XU10J4RS engine replacing the S16's 155 bhp XU10J4 ACAV,[14] and some subtle chassis revisions. As well as being more powerful, the GTI-6 engine had more flexible power delivery with more mid-range torque than that in the S16, and the new gearbox made it easier to use the engine more effectively. The GTI-6 was introduced as a Phase 1 model and was to last until the end of 2000. It received Phase 2 and 3 cosmetic and electrical updates alongside the rest of the range, but the engine and mechanical specification remained largely unchanged.
