page_title: Proton Persona (BH)
section_title: Powertrain
hierarchical_section_title: Proton Persona (BH) / Powertrain
caption_attribution_description: Only one engine is available, a Proton-engineered 1.6-litre naturally aspirated unit, first used in the Iriz. However, it has been refined for better NVH attributes. The Getrag 5MT and Punch CVT have also been carried over from the Iriz. And similarly, Proton has refined the CVT for a smoother drive. Fuel efficiency has also improved 10% to 6.1L/100km with the CVT, and 13% to 5.6L/100km for the manual.
context_page_description: The Proton Persona (BH), codenamed P2-31A is a subcompact saloon engineered by the Malaysian automobile manufacturer Proton. The BH series represents the third and latest generation in the Proton Persona lineage. It was unveiled on 23 August 2016 as the successor to the CM Persona.
  The BH Persona is based on an extended Proton Iriz platform and shares the latter's 1.6-litre VVT engine and basic structure, but its exterior design has been completely re-engineered to give it a distinct persona. The interior of the BH Persona is largely unchanged over the Iriz, with the main exception of the new two-tier colour scheme.
  The BH Persona is one class smaller than the outgoing CM Persona, but it offers more headroom, comparable rear legroom and a significantly larger boot. The new BH is also more powerful, fuel efficient and sophisticated than the old CM. It is the latest model to carry Proton's newfound 'affordable safety' USP, and all BH Persona variants have been awarded the full five-star rating by ASEAN NCAP.
context_section_description: The new BH Persona is powered by Proton's 1.6-litre VVT S4PH engine, a naturally aspirated, four-cylinder, 16-valve DOHC petrol unit with variable valve timing. The 1.6-litre VVT, the sole option in the BH Persona, is capable of 107 hp at 5,750 rpm and 150 Nm at 4,000 rpm. Although the engine appears mechanically identical to its previous application in the Iriz, Proton has made further refinements for reduced noise, vibration and harshness (NVH) and improved fuel efficiency. The 1.6 L engine in the new Persona is fitted with a three-mount configuration, as opposed to four in the Iriz. Proton claims that the improved mounting configuration has reduced transmissions of engine vibrations into the cabin, and is six decibels quieter when compared to the equivalent Iriz model. Additionally, the new exhaust system in the BH Persona has remedied exhaust drone at lower revs, and the ECU has been recalibrated for a more linear throttle response. The new VVT engine also has a longer 10,000 km service interval.
  Like the Iriz, the new Persona is paired to either a Getrag 5-speed manual or a Punch Powertrain VT2+ CVT. However, Proton has refined the Punch CVT for a smoother drive, and in its latest iteration is claimed to be far more responsive and has narrowed the gap to its competitors. As a result of the various refinements made to the engine and transmission combination in the BH Persona, Proton claims that fuel efficiency has improved by 13% to 5.6L/100 km with the manual, and by 10% to 6.1L/100 km with the CVT, both at a constant speed of 90 km/h. The BH Persona is the first Proton model to utilise the company's new ECO Drive Assist feature. The system assesses the driver's throttle input, and a green indicator on the instrument cluster will light up when the car is being driven in an economical manner. The engine in the new BH is also VVT-enabled, while its old CM counterpart was not. The BH has a 40-litre fuel tank, 10-litres smaller than the CM.
  The new BH Persona has 3 hp less than the outgoing CM series, but the full 107 hp is accessible earlier at 5,750 rpm, compared to 6,500 rpm in the old CM. Additionally, the BH has 2 Nm more torque over the CM, while access speed is unchanged at 4,000 rpm. Acceleration has also improved, with the CVT-equipped BH taking 10.9 seconds to reach 100 km/h from a standstill, which is 3 seconds faster than the old 4-speed automatic CM. Proton has decided not to offer the Iriz's 1.3 L VVT engine in the new Persona, as they intend to prevent overlapping and cross cannibalisation by fitting it in the upcoming 2016 Proton Saga instead.
caption: All BH Persona variants are powered by Proton's 107 hp 1.6-litre VVT S4PH engine.
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