Peugeot BlueHDi 1.5 Engine Specs

The Peugeot BlueHDi 1.5 is a 1.5-liter turbocharged inline-four common-rail diesel engine produced since 2017, developed by the PSA Group (now Stellantis) as part of its BlueHDi range of clean diesel engines, designed to meet strict Euro 6 emissions standards while retaining the traditional diesel strengths of low fuel consumption and strong torque. It has been used across the Peugeot 308, 3008, 5008, and 508, as well as the Citroën C4 and C5 Aircross, and the Opel/Vauxhall Grandland, reflecting its wide deployment across the PSA/Stellantis group's shared platforms.

Producing between 100 and 130hp and 250-300Nm of torque from 1,499cc, the BlueHDi 1.5 uses a DOHC head, common-rail direct injection, a single turbocharger, and a high 16.0:1 compression ratio typical of modern diesel combustion, delivering strong low-end pulling power and genuinely impressive real-world fuel economy, particularly for highway-focused drivers where diesel engines traditionally offer their biggest efficiency advantage.

The "Blue" in BlueHDi refers specifically to PSA's SCR (selective catalytic reduction) emissions aftertreatment system, which injects AdBlue diesel exhaust fluid into the exhaust stream to reduce NOx emissions - an additional maintenance consideration compared with older diesel engines that lacked this technology. AdBlue levels need periodic topping up (most vehicles warn well in advance), and the overall aftertreatment system, including the diesel particulate filter, requires occasional regeneration cycles that are best supported by including regular longer drives rather than exclusively short urban trips, since short-trip-only driving is more likely to trigger DPF-related warning lights. The EGR valve is prone to carbon buildup, particularly in stop-start city driving, and periodic cleaning helps maintain smooth running and emissions compliance. Fuel injectors are sensitive to fuel quality and benefit from occasional cleaning, and the timing belt or chain (depending on variant) should be serviced according to the manufacturer's schedule given this is an interference engine. With reasonable maintenance and a driving pattern that includes regular longer journeys, the BlueHDi 1.5 delivers genuinely strong fuel economy and dependable performance.