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  BMW i7 M70 xDrive      

  Article Image gallery (24) Specifications  
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Country of origin:Germany
Introduced in:2023
Internal name:G70
Engine type:Battery Electric Vehicle
Source:Company press release
Last updated:April 18, 2023
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Click here to download printer friendly versionThe most powerful all-electric BMW model: BMW M is introducing an all-electric performance model to spearhead the new BMW 7 Series range. The BMW i7 M70 xDrive is the most powerful model with an all-electric drive system in the overall BMW Group portfolio. Equipped with an electric motor at both the front and rear axle generating a maximum system output of 485 kW/660 hp and an M-specific chassis, the new BMW i7 M70 xDrive delivers the perfect combination of electric mobility and performance, resulting in a driving experience unique in the luxury segment. The range-topping model of the new BMW 7 Series line-up accelerates from 0 to 100 km/h (62 mph) in 3.7 seconds, making it the fastest all-electric BMW model. Top speed is electronically limited to 250 km/h (155 mph).

Producing the highest output ever for an all-electric car from the BMW Group, the BMW i7 M70 xDrive marks another milestone for BMW M GmbH in its electric mobility transformation. Following the launch of the BMW i4 M50 – BMW M GmbH’s best-selling model worldwide in 2022 – and the BMW iX M60, this is now the company’s third performance model to have an all-electric drive system. The success of electric propulsion among BMW M brand enthusiasts, the consistent expansion of the product offering and the repeated increases in drive system output clearly highlight the huge potential of electric tech to deliver performance that captures the imagination.

The new all-electric performance model from BMW M will make its global debut at the Auto Shanghai international motor show (18–27 April 2023) in China. It will be built at BMW Group Plant Dingolfing, together with all other model variants of the luxury sedan. As well as being the lead plant for luxury models, the production facility in Lower Bavaria is also home to the competence centre for electric drive system production, which manufactures both the electric motors and the high-voltage batteries for all variants of the BMW i7 on site. The worldwide launch of the BMW i7 M70 xDrive will start in the second half of 2023.

The fifth-generation BMW eDrive technology installed in the BMW i7 is being constantly developed in order to further improve both power output and efficiency. This applies not only to the powertrain and power electronics, but also to the high-voltage battery and charging technology.

The BMW i7 M70 xDrive is equipped with highly integrated drive units at the front and rear axles, which bring together the electric motor, power electronics and transmission within a single, very compact housing. The two motors work according to the principle of an electrically excited synchronous motor. This type of design makes it possible to completely avoid the use of rare earth metals (required for magnetic components) in the manufacture of the rotor.

An M-specific configuration of the drive system enables the BMW i7 M70 xDrive’s rear-axle motor, in particular, to achieve unprecedented levels of power density. The drive unit has a six-phase design with a dual inverter. This forms the basis for a very substantial increase in peak output that remains on tap up to high speeds, endowing the BMW i7 M70 xDrive with the power delivery characteristic of M models. The motor’s power density of 2.41 kW/kg represents an increase of 25.5 per cent over the unit that drives the rear axle of the BMW i7 xDrive60 and means that the BMW i7 M70 xDrive is fitted with what is currently the company’s most powerful electric motor.

This new standard-setting figure can be attributed to a BMW Group-patented innovation developed under the umbrella of BMW EfficientDynamics, which uses six excitation windings in the motor’s stator instead of the customary three. The resulting “double excitation” compared with conventional units allows the electric motor to generate an extremely high output, despite its exceptionally light and compact design, and to maintain it continuously into the higher echelons of the speed range. This solution is also far superior to a drive configuration using two motors at the rear axle in terms of both power density and efficiency.

The motor powering the rear axle generates peak output of 360 kW/489 hp. Its precisely coordinated interaction with the 190 kW/258 hp motor at the front axle creates an electric all-wheel-drive set-up generating system torque of 1,015 Nm (748 lb-ft) in Sport mode and as much as 1,100 Nm (811 lb-ft) when M Launch Control or the M Sport Boost function is activated. The drive system in the BMW i7 M70 xDrive therefore offers outstanding pulling power. Capable of sprinting from 0 to 100 km/h (62 mph) in an impressive 3.7 seconds, the BMW i7 M70 xDrive is the fastest purely electrically powered BMW model. Top speed is electronically limited to 250 km/h (155 mph). The performance characteristics of the drive system are also characterised by sustained power delivery, which ensures rapid speed increases even in higher speed ranges.

With the M Launch Control function, both drive and traction control are integrated into the engine control unit. This ensures the power generated by the electric motors is metered extremely precisely, allowing the drive system’s M-typical performance characteristics to be instantly converted into stunning acceleration without any loss of traction.

The M Sport Boost function is activated with the shift paddle on the left of the steering wheel and is visualised by Performance-specific graphics in the instrument cluster. At the same time, the standard BMW IconicSounds Electric by Hans Zimmer provides a fitting acoustic accompaniment by switching to a particularly exhilarating, M Performance-specific note.

The soundtrack’s character varies according to the vehicle setting selected, with a clearly perceptible acoustic distinction between the My Mode Personal and Sport. In Sport Mode, the spectrum of sound is particularly dominant and powerful. The drive sound composed specifically for fully electrically powered BMW M models therefore helps to give an even more intense experience of the performance characteristics.

The extremely dynamic performance of the BMW i7 M70 xDrive is allied to excellent long-distance capabilities. Credit here goes not just to the efficiency of the highly integrated drive units, but also a wealth of measures for reducing power consumption. These include adaptive recuperation of braking energy and the heat pump technology used in the integrated heating and cooling system for the cabin and powertrain. The BMW i7 M70 xDrive posts a combined electric power consumption of 23.8 – 20.8 kWh per 100 kilometres in the WLTP test cycle.

Another factor alongside this optimised efficiency is the high-voltage battery’s impressive energy density. Located in the vehicle’s underbody, the battery provides 101.7 kWh of usable energy. This gives the BMW i7 M70 xDrive a range of 488 – 560 kilometres (303 – 348 miles, WLTP cycle), making it eminently suitable for everyday use. The Combined Charging Unit features exceptionally advanced charging software designed for charging the high-voltage battery faster and more efficiently. The BMW i7 M70 xDrive is capable of AC charging at up to 22 kW as standard, while DC power can be taken on board at a rate of up to 195 kW. This means the range can be extended by as much as 170 kilometres (106 miles, WLTP) in just ten minutes during a mid-journey stop at a high-power charging station.

The car’s range can be extended while on the move by activating a new drive system setting. The launch of the BMW i7 M70 xDrive marks the introduction of a MAX RANGE mode for the all-electric models in the new BMW 7 Series range. In this mode, drive power and top speed are carefully restricted and comfort functions scaled back, allowing range to be increased by some 15 to 25 per cent.

The MAX RANGE mode was mainly devised for situations where drivers are unable to recharge mid-journey as originally planned because, for example, the charging station they were heading for is out of service. Switching to the My Mode Efficient and activating the MAX RANGE setting extends the range by a comfortable margin for the journey to an alternative charging point for the high-voltage battery. To this end, the vehicle’s top speed is limited to 90 km/h (56 mph). At the same time, the climate control system for the cabin is deactivated and the rear window heating switches to a lower setting, while seat heating, seat ventilation and the steering wheel heating are all disabled too in MAX RANGE mode. A popup window appears in the control display indicating the resulting gain in range as a distance. The information display also blanks out the section of the speed gauge beyond 90 km/h (56 mph) and shows the extra range.

The MAX Range mode can be triggered using the control display’s touchscreen functionality, the Controller or voice commands to the BMW Intelligent Personal Assistant. It can also be deactivated by hard in-gear acceleration (kickdown), engaging the M Sport Boost function or switching windscreen ventilation to maximum.

In addition to the extreme power of the drive system, chassis technology tuned precisely to deliver M-specific performance characteristics contributes to a unique performance experience in the luxury segment.

The electric all-wheel drive, the steering, the dampers and the driving stability systems are each underpinned by the M-specific application of all control systems, ensuring superbly judged driving characteristics in all situations. The overall package of measures was fine-tuned during an exhaustive programme of testing and produces exceptionally sporty handling for a model in this class, accompanied by high comfort over long distances. Helped by the almost silent drive system, passengers in the rear seats, in particular, can enjoy sumptuous levels of comfort. On the other hand, when the driver is exploring their sportier side, the BMW i7 M70 xDrive unveils the blend of dynamism, agility and precision with which BMW M models are synonymous and which is without parallel in this class. The My Mode Sport activates powertrain and chassis settings that are all geared purely to dynamic performance for an exhilarating driving experience.

Standard specification for the BMW i7 M70 xDrive includes M‑specific adaptive two-axle air suspension with electronically controlled dampers and automatic self-levelling. M-specific air springs with reduced volume and an adapted rolling contour increase the number of vibrations on the front and rear axles by six in each case and provide a noticeably direct connection to the vehicle body. M-specific hydraulics are also used to optimise damper response.

An additional shear panel between the bulkhead and spring strut towers produces a substantial increase in body rigidity at the front end of the BMW i7 M70 xDrive. Also to be found on the standard equipment list are Integral Active Steering and the Executive Drive Pro chassis package including active roll stabilisation with Active Roll Comfort. As well as helping to increase comfort, these two systems – together with the stiffer body – hone the car’s handling dynamics. This translates into an appetite for corners, which are taken with sharp and precise turn-in characteristics.

The blue M Sport brakes with M logo fitted as standard come with large brake discs for increased stopping power. Brake callipers painted in black are available as part of the optional M Performance package. This is also the first time that sport tyres have been offered as an option for a purely electrically powered BMW 7 Series model. The standard 21-inch M light-alloy wheels on the new BMW i7 M70 xDrive feature an exclusive, aerodynamically optimised design with a Jet Black solid finish and high-gloss metal inserts.

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  Article Image gallery (24) Specifications