Besides dispensing with the traditional engine bay on a car, hub motors save space and weight because there is no need for a mechanical transmission, with its driveshafts and differential units.

除了不需在汽车上配置传统发动机舱，由于轮毂电机不需要机械传动(一般有传动轴和差别单位)，轮毂电机能节省汽车空间并减少重量。

youdao

In today's Audi's the engine hangs in front of the front axle, and obviously bringing the engine back will help with mass centralization and front-rear weight balance.

在今天的奥迪车上，发动机装在前轴前端，而把发动机后置显然会有助于大规模集中和前后轴重量分配平衡。

youdao

Climb LIMIT weight, Maximum takeoff weight based on a minimum climb gradient with one engine inoperative.

爬升限重，取决于由一台发动机工作时的最低爬升梯度的最大起飞重量。

youdao

It also lacks such civilized touches as a clutch or a transmission--again, too much weight--so even with the engine idling, it wants to go about 50mph.

FORBES: Real men eat dirt

It also lacks such civilized touches as a clutch or a transmission--again, too much weight--so even with the engine idling, it wants to go about 80 kilometers per hour.

FORBES: Real men eat dirt

And this is with a lighter V8 engine taking the place of the V10, as well as a concerted effort to reduce weight with, for example, a carbon-fiber roof panel.

WSJ: 2013 BMW M6 Coupe Review: A Hurtling Flume Ride on Dry Land | Rumble Seat by Dan Neil