Proton i-GT vs Campro VVT, CFE vs GEP3 – power, torque curves, fuel efficiency test results compared – paultan.org

The Proton Tech Showcase has revealed that the i-GT 1.5-litre engine now used in the X50 facelift, as well as the 2026 Saga MC3, will be heading to the upcoming updated X70,

Proton has revealed that the i-GT 1.5-litre engine, in its naturally aspirated and turbocharged versions, will have a local share of 54% and 45% respectively, and the Malaysian carmaker has also detailed how the new engines have been improved compared to their predecessors.

To start with the numbers: the 1.5 i-GT engine in the facelifted Claimed fuel consumption of 6.1 liters per 100km represents a 16.1% reduction, and Proton claims a class-leading torque-to-weight ratio of 2.64Nm per kg.

For the 1.5 i-GT engine in naturally aspirated form, as found in the Saga MC3, its outputs of 88 kW (120 hp) and 150 Nm represent a gain of 25.7% and 25% in power and torque respectively, while the 0-100 km/h acceleration time of 11.6 seconds is 21.6% faster than that of its predecessor, the Saga MC2, which set the benchmark did. 14.8 seconds.

Compared to Proton’s older turbocharged engine, the 1.6-litre CFE turbo engine with port fuel injection, the 1.5-litre i-GT turbo mill offers 41% more usable torque, according to Proton, and the new engine shows greater torque across the engine speed range, from 1,000 to 6,000 rpm.

Like the older 1.6T engine, the turbocharged i-GT reaches peak torque at 2,000 rpm, although peak torque appears to taper off for longer compared to the older engine.

In terms of power, the turbocharged 1.5-litre i-GT also offers higher power across the rev range, reportedly 17% more, and the new engine brings a steeper ramp to its peak power of 5,500rpm, compared to the 1.6T CFE engine’s plateau, which also peaks at 5,500rpm before the 6,000rpm limit.

Compared to the 1.5 liter CEP3 three-cylinder engine previously found in the

Power and torque have increased across most of the rev range, although the i-GT’s power and torque ranges appear to be below that of the GEP3 turbo engine, from 4,500 rpm to 5,250 rpm. Bench fuel consumption figures for the 1.5 liter i-GT turbo engine show a 6% improvement over the 1.5 liter GEP3 three-cylinder turbo engine, and a 20% improvement over the 1.6 liter CFE turbo engine.

Compared to naturally aspirated engines, the NA version of the 1.5 i-GT engine offers a gain of 25% more torque and 26% more power, compared to the also naturally aspirated 1.3-liter VVT engine with smaller displacement. According to the official specifications for the 2026 Saga MC3, this port-injected BHE15-CFN engine produces 120 hp at 6,100 rpm and 150 Nm from 4,000 rpm to 5,000 rpm.

As mentioned, the 1.5-litre i-GT engine will be seen in naturally aspirated and turbocharged versions in upcoming updated iterations of the Proton X70, X90 and S70.

GALLERY: Proton i-GT engine presentation slides

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