Peugeot hit for six
The manual and semi-automatic transmissions are available on S, Sport and SE HDi 110 models, replacing a five-speed manual gearbox.
The automatic unit is available on 2.0 litre HDi 136 five-door SE models.
The additional gear will mean that both fuel consumption and carbon dioxide emissions for the 308 hatch will fall under certain circumstances.
Two engines have also been added to the Peugeot 308 Sport range: a 93bhp 1.4-litre petrol and an 88bhp 1.6-litre diesel.