Mazda MX-5: Revised engine with Euro 6d-Temp

Mazda MX-5 Skyactive-G 184
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E That's right: We have constantly emphasized that the 1.5-liter with 131 HP is the better choice for the MX-5, because the two-liter with 160 HP cost significantly more without going much better.

Now, however, after the revision, it's different. Now we advise you: If your budget is almost 5,000 euros more, then take the maximum engine. It's worth the extra charge.

More thrust

air in the two-liter direct injection engine now through enlarged intake valves. The stepped upper edge of the piston is supposed to reduce the amount of unburned fuel.

You shouldn't be confused by the nominal value: The data only shows five Newton meters more - but the maximum is 600 rpm earlier than before. So the two-liter direct injection grabs exactly those 600 rpm earlier. And it lasts longer, spinning around 700 revolutions more than before, before the red zone begins. The range in which you really feel the thrust has increased by around 1,300 rpm.

Now the completely redesigned two-liter looks noticeably livelier than its predecessor, revs up more joyfully and increases the fun potential compared to the weaker engine enormous.

What inspires the two-liter four-cylinder? First of all, a better supply of fresh air. We are still dealing with the increasingly rare class of vacuum cleaners - no turbocharger as a pre-compressor can help them get going. The increase in performance and throttle response therefore depend largely on the fact that a lot of air quickly gets into the combustion chambers. This is ensured by a larger throttle valve and more generously dimensioned intake manifolds. As a result, the intake channels also have more throughput, whereas the exhaust valves have the burnedExhaust gas discharged faster.

The fact that the four-cylinder revs faster is also due to the reduced mass: the developers saved 27 grams on the pistons and 41 grams on the connecting rods.

Where we are mentally located in the combustion chamber: Higher injection pressures and redesigned pistons increase the so-called tumble flow (the swirl in the turbulence). This allows the fuel to atomize more thoroughly and consequently burn more cleanly; fewer soot particles are produced.

The latter is important - for the classification of the engine. Here, the two-liter, like the 1.5-liter, reaches Euro 6d-Temp even without a petrol particle filter.


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