The XUD engine
1905cc diesel and turbo diesel
versions were produced for the 306 between 1993 and 1999. The engines
were the same units as previously seen in the award winning 405 series
in the early 90s. The unit itself was the bigger brother of the 1.8d and
td engines that were used in many Peugoets in the 80ís. The 1.9 turbo
version was intercooled and produced an impressive 92bhp and 145 lbs/ft.
The non turbo was ultra economical 55mpg and a respectable 70bhp.
Word has it that the turbo charged
engine had to be de-tuned prior to its release because it was on par
with the XSi model performance wise. Because of is this, the engine is
very easy to tune with its mechanical injection systemÖ. with just a
small tweak of the fuel pump and shortening of the wastegate arm, big
gains can be seen.
It was considered to be one of the
finest diesel engines of its time only superseded by the common rail
engines the Germans developed in the mid - late 90s. The diesel engines
are also widely renowned to be bomb proof in the reliability stakes. The
early models were prone to head gasket failure but apart from that the
engines were very, very good and have been known to go to 200,000 miles
The Dturbo model was the top of the
line 3 door with XTDT being the top 5 door. (There were very few Dturbos
produced with 5 doors)
The DW10 (HDi) engine
The 2.0 L DW10 was the first PSA Diesel engine to feature common rail direct injection, and was given the commercial designation HDi.
It has a bore of 85 mm (3.3 in) and a stroke of 88 mm (3.5 in) for a
total displacement of 1997 cc, replacing the XUD9 in 1999. It was
initially available in 90 PS (66 kW) form, with two valves per cylinder
and a non-inter-cooled turbo.
The DW10 was used as the basis for the new family of Diesel engines co-developed with Ford,
and it is used in the many Fords besides various CitroŽn and Peugeot
passenger models. The DOHC 16-valve power plants (not seen in a 306) were
mated to a second generation common rail injection system and a
different turbo, pushing power to 136 PS (134 hp/100 kW).
Going with the flow of the common
rail engine, Peugeot had developed the 2 litre HDi engine to keep up
with the Germans; a much more refined, smoother and quieter engine than
its predecessor. It was slightly down on power with 90bhp but torque
was improved with around 155lbs. Strangely Peugeot chose not to fit an inter-cooler to the 90bhp version (110bhp versions were seen in the 406
The engines respond well to re-maps
and tuning box technology, although an after-market inter-cooler is needed
to get big power increases from them.
Trim levels remained high with the Meridian and Dturbo being the top of the range.