BMW is working on the development of its biggest Boxer engine yet. The details surrounding the new engine, however, have been scarce, despite the manufacturer showcasing not one but two concepts built around the engine. The House of Munich has managed to keep the mill’s specs secret. Until now. The company has finally opened up and shared the details of the new engine. Here are the big lines.
BMW finally came out with its own design in May, dubbed the R18 Concept.
We now know that the model is heading for production and that it will launch sometime in 2020. Until now, however, the engine that underlines the new big German cruiser has remained a bit of a mystery. The displacement and the number of cylinders were the only available specs. Not anymore! We now get a full portrait of what’s going on inside the massive block.
First off, to be specific, the engine’s displacement is 1,802cc rather than the round number it’s been referred to for the past few months. The two cylinders have a 107mm bore and the aluminum pistons, a 100mm stroke. The block alone weighs a staggering 244.3 lb—including the transmission and the intake system.
The engine’s over-head valve with dual camshaft set up is inspired by BMW’s early Boxers like the one found in the 1936 R5. To avoid excessive vibration of the crankshaft caused by the cylinders’ massive volume, an additional bearing has been added at the center of the shaft.
What about power figures? We have those too! The new ginormous Boxer is expected to produce 91 horsepower and 116.5 lb-ft of torque at 3,000 rpm. BMW adds that the engine will max out at 5,750 rpm.
Availability of the BMW R18 (provided that will remain the name once it hits production) has yet to be announced.
For those of you familiar with all the technical lingo, I have joined the full BMW press release if you want to learn more about the finer details of the new engine.