Not too long ago, the alphanumeric trim model naming strategies at both BMW and Mercedes-Benz allowed consumers to discern quite a bit of information from the trunklid badges. A BMW 325i was a 3-series with a 2.5-liter engine, while the 530i displaced 3.0 liters in the larger 5-series body style. The Mercedes-Benz 240D was powered by a 2.4-liter diesel engine, while the 300TD ran via a, surprise, 3.0-liter turbo-diesel engine. There were of course some exceptions – the early 80s BMW 320i only displaced 1.8 liters – but for the most part, the model designations were intuitive.
Take a look at BMW’s lineup today, and the names reveal little. The 328i, 335i, 528i and 535i all displace 3.0 liters, although the 328i and 528i models are naturally aspirated while the 335i and 535i are turbocharged. A 4.8-liter V8 is fitted within 550i, 650i and 750i models, making 10 more horsepower than the 4.8-liter V8 in the X5 4.8i. BMW is clearly trying to delineate models based on relative outputs, but will likely confuse buyers accustomed to the previous displacement-determined strategy.
Mercedes-Benz’s 2007/2008 lineup in the U.S. still maintains a semblance of “honesty.” The C350, CLK350, E350, ML350 and R350 all include a 3.5-liter V6, while the CLK550, CLS550, E550, SL550, S550 and others are driven by a 5.5-liter V8. A 5.0-liter V8 powers the G500 SUV. AMG models with 5.5-liter and 6.3-liter V8 engines are also named appropriately (i.e. SL55 and E63, respectively).
But other current MB models are not as accurately descriptive. The E320, ML320, R320 and GL320 all include a 3.0-liter turbo-diesel engine, and the S600, CL600 and SL600 all go thanks to a 5.5-liter biturbo V12. The GL450 SUV is propelled by a 4.6-liter V8; Mercedes probably likes the ring of “450” better.
According to a recent press release by Mercedes-Benz, future models will be named based on “performance potential,” especially when accompanied by alternative fuel technology such as BLUETEC emissions treatment and hybrid-electric systems. The S400 Hybrid shown at the Frankfurt Auto Show only includes a 3.5-liter V6, but because of its electrical supplementation performs like a larger engine (without the fuel consumption). Lexux’s RX400h hybrid SUV is very similar, in that the 3.3-liter V6 is augmented by a hybrid system and thus earns the higher numerical distinction.
Source and image: Mercedes-Benz