Test drive Mazda 3 1.5 SKYACTIV-D 105 CV, another way of doing things

Diesel models with around 100 CV are a segment that is becoming increasingly difficult for manufacturers, not because there is no demand (especially in our country), but because emissions regulations are becoming ever more restrictive, which makes it necessary to add gas treatment systems to diesel engines that increase the cost. Mazda created its engine range from scratch years ago by a little-explored route, with Skyactiv technology, a series of engine improvements to be as efficient as possible and meet emissions regulations without resorting to NOx-Trap systems or the famous AdBlue.

But to be able to compete on equal terms with its European rivals, Mazda needed a lower-displacement diesel engine for those who are not looking for the sportiness and performance of the 2.2 Skyactiv-D with 150 CV. That is why this Mazda 3 equipped with the 1.5 Skyactiv-D with 105 CV is a very rational, economical model that is more than sufficient for everyday use.

We normally begin by analyzing the exterior design of the star of the test, in this case the Mazda 3 Sportsedan, but our test team has already had the opportunity to analyze the design in depth during a long-term test across several European countries (Mazda 3 Frankfurt Test). The most notable aspect of the design is the sportiness conveyed by its front end, based on the KODO design language, and the interior quality, which we do not hesitate to describe as premium, especially highlighting the space in the rear seats and boot.

Engine and performance

Since what is truly new in the star of this test is the powertrain, we are going to analyze this 1.5 Skyactiv-D unit that delivers 105 CV in more detail. It is a new 1,499 cc block with variable-geometry turbo, four cylinders and common rail injection, standing out with a torque figure of 270 Nm between 1,600 and 2,500 rpm. Thanks to the turbocharger equipped with a speed sensor, the engine offers improved performance and pulls strongly beyond 5,000 rpm.

Taking the 2.2 block as a reference but 50 kg lighter, this 1.5 Skyactiv-D has a very low compression ratio (14.8:1), which produces combustion at a lower temperature and greater efficiency. This efficiency also extends to the reduction in weight of the engine’s structural components and therefore to lower friction. Air intake and exhaust gas recirculation (EGR) have been strengthened, lowering the combustion temperature and thereby improving gas emissions, achieving CO2 emissions of just 99 g/km.

Finally, it incorporates the “Natural Sound Smoother” technology, that is, it fits a dynamic damper in the piston pin connecting the piston to the connecting rod, and as a result the vibrations and noise of the powertrain are reduced, something that is especially noticeable at idle.

How does this Mazda 3 1.5 SKYACTIV-D 105 CV handle?

Now that we know in more depth all the technology and improvements this Skyactiv unit incorporates, it’s time to describe it from behind the wheel. The first thing we notice as soon as we turn the key is the absence of vibrations, with a sensation closer to a petrol engine than a traditional diesel. Although it has only 105 CV, it is an engine with good response from low revs, around 1,500 rpm, and firm response in the region of 2,500 rpm, all while revving in a linear way and always with an unusual refinement for a diesel.

Paired with the engine is the six-speed manual gearbox, with an outstanding feel (as is customary for the brand) and a chassis that calls for more horsepower and is not afraid of bends or difficult stretches of road; in fact, it is one of the most dynamic compacts on the market (something we were able to verify in depth during the long-term European test with the 2.2 SKYACTIV-D 150 CV engine).

Although the best diesel engine in terms of response and sportiness is the 150 CV one, this 105 CV is a rational alternative for those who are not looking for a sporty response, but for a calmer, smoother and sufficient response for everyday use. If we travel with the car loaded or with all the seats occupied, we will notice that there are only 105 CV under the bonnet. However, on country roads or motorways, it is an engine that moves with considerable ease and good consumption figures.

In our usual motorway test, the average consumption was around 4.9 litres per 100 km, although an average consumption of 4.5-5 litres per 100 km is easy to achieve.

Price and Equipment of the Mazda 3 1.5 Skyactiv-D 105 CV

Our version was the Luxury, that is, the top of the range. Even so, the introduction of this new engine allows the entry price of the diesel range to be lowered (Mazda 3 range from 18,350 euros), and with the Style trim (which is one of the most complete) the price of this 105 CV diesel stands at 23,150 euros, while the Luxury trim rises to 25,865 euros, with a comprehensive equipment list: bi-xenon headlights, 18-inch alloy wheels, Bose sound system with 9 speakers (and a sublime quality), emergency braking assist in the city, parking sensors, among other features.

Opinion of the Mazda 3 1.5 Skyactiv-D 105 CV

My opinion of this Mazda 3 Sportsedan 1.5 Skyactiv-D with 105 CV is that it is a very rational car, a model that offers something more than the typical compacts from mainstream brands (whether through its design, its finish or its equipment), while at the same time opting for a smooth, economical engine with a power figure more than sufficient for those who want a diesel that devours kilometres without being sporty. Its ideal habitat is the open road or motorway, and it also has a chassis that lets us move with great agility whatever the route. The downside is perhaps the price, although it must be acknowledged that in terms of equipment it comes very complete, and having safety features such as blind-spot warning, adaptive cruise control or a Bose sound system is not something available on all the compacts it competes with.

Photos | Rubén R.