Primera Engine Stuff:

Nissan's new 1.8-litre engine is the cleanest petrol engine in its class. With a powerful new 32-bit engine management system the UK-developed new technologies ensure the 1.8-litre engine does not dilute the Primera's sporting appeal.
The new engine develops 97 per cent of its maximum torque at low engine speeds between 2400-4800rpm. Peak torque of 151Nm is generated at just 2800rpm, peak power of 113PS at 5600rpm. In mixed-use economy tests it returned an average of over 38mpg.

The new engine also includes a series of innovations designed to further reduce noise and harshness. A new inverted tooth design of timing chain dramatically reduces friction and is almost silent.

Durability testing of the new engine design is exhaustive and includes Nissan's unmatched over-speed durability test. The test involves running the engine on a dynamometer at speeds 15 per cent over the red line for 40 hours continuously (that's 7600 rpm for nearly 4 days, maybe that's how Nissan can give a 3 Yr warranty! ).

StarTrek Diagnostics:
On-Board Diagnostics (OBD) system warn the driver if emissions are exceeding strict standards soon to be introduced across Europe. The system detects any component or system deterioration that might affect the car's low emission levels.

The OBD system detects even a momentary increase in emissions, the driver is immediately alerted and a record made of the episode in the vehicle's engine management system. If the situation persists, an indicator light remains on until it has been investigated and resolved by a dealer.

The OBD system senses things such as the engine misfiring or the catalyst malfunctioning that may affect emission levels.It exceeds European legislation emission levels of harmful hydrocarbons (HC) and nitrogen oxides (Nox) not due until 2005. Variable valve timing and direct ignition are key to the engine's low emissions & the Primera has achieved the ISO 14001 accreditation for its environmental management system.

Green Award:
Switzerland's Association for Transport and Environment has conducted its annual survey for 'green' cars and awarded a top class title to the Nissan Primera.

The Primera 1.8-litre, launched in September 99, topped the medium sized category for family cars. Unlike many ecologically based analyses, the ATE evaluation not only takes into account the 'green issues' such as fuel consumption and exhaust emissions, but also performance related factors such as maximum speed and noise.
Nissan say the Primera's success is down to a swirl control valve in the engine's inlet tract. This was a feature previously reserved for diesel-engined vehicles. The new 1.8-litre engine was among the first petrol engines to adopt the system. The valve is closed during warm-up and at low engine speeds, redirecting the air flowing through the inlet ports. The re-routed airway increases tumble swirl in the combustion chamber to enhance combustion for improved emissions and reduced fuel consumption (oh no please don't compare this to a diesel)

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