The COVID-19 pandemic may have temporarily shut factories and affected vehicle sales, but that hasn't stopped brands like BMW from continuing to develop their future cars.

Lately the Bavarian automaker has been busy doing the final rounds of testing for the all-new 4 Series at the company's Research and Innovation Center in Munich. The car itself is covered in a camouflage livery, but the engineers are fast-tracking their latest findings and tests in order to fine-tune the upcoming two-door.

2021 BMW 4 Series enters final round of testing image

Remember when BMW revealed the Concept 4 late last year? Let's just say that its gaping maw didn't exactly impress fans. Well, it looks like BMW took notice and it appears they have decided to tone down the large kidney grill design for the production car.

Despite the camo livery hiding some key details, it's quite apparent that BMW made the grill smaller and more cohesive with the body. Other parts of the front fascia have yet to be fully seen as well. But at least we got a good look at the 4 Series' new headlights which appear to have been made sleeker and more aggressive in terms of design.

2021 BMW 4 Series enters final round of testing image

Besides giving us a glimpse of its exterior, BMW also released several pictures of the all-new 4 Series' interior. But since this is still a prototype, BMW had to cover most of the cabin's key features. Perhaps the all-new 4 Series will be available with the latest Operating System 7.0, as well as new interior trimmings and features not seen on the predecessor. What we do know, however, is that the 4 Series now adopts BMW's new digital cockpit.

Performance-wise, BMW mentioned that there will indeed be an M model for the next-generation 4 Series in the form of the M440i xDrive Coupe. It will have a turbocharged inline-six that is estimated to produce over 370 PS and will benefit from a 48V mild-hybrid system. With the help of electrification, BMW claims that the new 4 Series will help improve efficiency, deliver better performance, and ease the load on the engine. BMW has yet to mention, however, the other engines that will be available in the 4 Series.

2021 BMW 4 Series enters final round of testing image

Over to its chassis and suspension dynamics, BMW claimed that the 4 Series will be lower, stiffer, and have a wider track than its closest sibling, the 3 Series. BMW mentioned that it will have a lower center of gravity, as well as have 57mm in height reduction. A wide array of stiffening components will also be installed to ensure it has improved handling.

With the 4 Series nearly ready for production, it might not be long before we get to see it fully revealed. But with the COVID-19 pandemic still posing a threat, we won't be surprised if BMW will delay its launch timeframe by quite a bit.