Nowadays, consumers don't look at power alone when deciding on what car to purchase. More and more consumers also consider fuel economy and emissions level. In response to these changes, Mercedes-Benz has introduced two new engines that offer improved performance and economy. The 3.5-liter V-6 engine boasts of gains of 38hp and 24% fuel economy.
Meanwhile, the V-8 engine raises output by 43hp and fuel economy by 22%. These improvements place the new 3.5-liter V-6 at 306hp/272 pound-feet and the new 4.7-liter twin-turbo V-8 at 435hp/516 pound-feet.
The current 3.5-liter V-6 delivers 268hp while the naturally aspirated 5.5-liter V-8 can generate 382hp. In particular, the V-6 is capable of 30.9 mpg, and the V-8 can achieve 24.7 mpg.
These figures are believed to be EU combined figures, but Mercedes-Benz has yet to confirm this. The V8 has 442 pound-feet of torque that's available from 1,600 rpm and full torque that comes on at 1,800 rpm. The V-6 has a maximum torque from 3,500-5,250 rpm. Mercedes-Benz gets both power and efficiency out of its upgraded engines through several methods.
One is through direct injection. The new twin-turbo V-8's forced induction also boosts performance and economy, while the V-6 drops its 90-degree layout for a new 60-degree V.
Thermal efficiency of the engines are also improved via the utilization of multiple injection and multiple ignition. However, the primary attraction in these engines is the stop-start.
The new mainstream V-8 and V-6 engines are added to Mercedes-Benz range, which already includes the new M157 AMG 5.5-liter twin-turbo V-8, which leverages the same core technologies to produce 571hp and 664 pound-feet of torque while still being capable of over 22 mpg. This engine will be featured in the S63 AMG that comes out this year.