The Biggest Technological Failure of This Decade

Each on their own the engineering teams of BMW, Chrysler, General Motor and Mercedes have produced some amazing products over the years. In a rare case of teamwork, cooperation and perhaps desperation the four diverse brands teamed up on the Dual Mode Hybrid System in a project called the Global Hybrid Partnership. The combined engineering synergy resulted in a much hyped hybrid powertrain too complex to explain yet one promising the world. As with many overhyped projects the Global Hybrid Partnership began to dissolve literally as soon as the first models hit dealerships and saw some of the brands sell fewer hybrids than Ferraris Enzos.

BMW ActiveHybrid X6 Delivers 20% Fuel Economy Improvement

BMW's 480 horsepower X6 ActiveHybrid has been rated by the EPA and the results are in, 17 city and 19 highway for a combined fuel economy of 18 mpg. The X6 ActiveHybrid combines the xdrive50i's twin-turbo V8 with electric motors to improve fuel economy. The nonhybrid X6 xdrive50i has EPA ratings of 13 city and 18 highway, and 15 combined. This means that the hybrid powertrain increases city fuel economy by nearly 31% while only giving a 5% boost on the highway. Overall drivers should expect a 20% improvement in fuel economy compared to the regular V8. A better example of the fuel economy improvement is the fact that the ActiveHybrid X6 has a higher combined fuel economy rating than the six cylinder X6 xdrive30i. However, BMW's focus on performance is evident as the ActiveHybrid's improvement in fuel economy is smaller than that seen by General Motor's SUVs which feature similar hybrid technology. Both companies took part in the Global Hybrid Cooperation. Only time will tell if BMW's focus on extra performance will pay off.

BMW X6 xdrive50i, 400 horsepower: 13/18 (15 combined)
BMW X6 ActiveHybrid, 480 horsepower: 17/19 (18 combined) 20% improvement

Cadillac Escalade 2WD, 403 horsepower: 14/20 (16 combined)
Cadillac Escalade 2 WD Hybrid, 332 horsepower: 21/22 (22) 37.5% improvement

Chevrolet Tahoe 4 WD, 320 horsepoer, 15/21 (17)
Chevrolet Tahoe 4WD Hybrid, 332 horsepower: 21/22 (22) 29% improvement

BMW 7 Series and X6 Hybrids Focus on Performance rather than Fuel Economy

BMW has released the full scoop on its long anticipated pair of ActiveHybrids. Both the X6 and 7 Series hybrids use the 4.4 liter twin-turbo V8 as the basis of the hybrid system. The X6 is a dual mode hybrid using technology developed with GM, Chrysler and Mercedes-Benz, used on vehicles such as the Chevy Tahoe Hybrid. The X6 uses two electric motors which combined with the turbo V8 results in 480 total horsepower and a huge amount of torque, 575 lb-ft to be exact. The 7 series uses a simpler hybrid system that places a smaller 20 horsepower electric motor between the V8 and a new 8 speed automatic transmission. Of note is the fact that the turbo V8 is good for 440 horsepower in ActiveHybrid 7, which is more than in the regular 750i. The combined maximum horsepower of the Active Hybrid 7 is 455 hp and 516 lb-ft of torque. BMW quotes a 0-60 time of 4.8 seconds for the Active 7 and 5.4 seconds for the X6 hybrid, this makes the Active 7 3/10th quicker than the 750i while the ActiveHybrid X6 trails the X6 xdrive50i by a tenth. On the other hand, BMW expect the ActiveHybrid X6 to get 20% better fuel economy than the 50i while the ActiveHybrid 7 only manages 15% better than 750i. Using simple arithmetic one would expect that the Active 7 might get an EPA rating of 17/25 compared to the 750i's 15/22. Same type of math results in the ActiveHybrid X6 possibly being rated @ 16/22 compared to 13/18 of the regular version. Official EPA numbers and prices are expected to be released later in the year.