http://www.bmwusanews.com/newsrelease.do?id=2345&mid=

New 340i Sedan features new 320 hp TwinPower Turbo Inline 6-cylinder.
This new 3.0 liter engine powering the 340i replaces the N55 powered 335i and tops the 3 Series gasoline line-up.
It produced a maximum power of 320 hp between 5,500 and 6,500 rpm, a 20 hp improvements over the previous model. Peak torque is an impressive 330 lb-ft, which is available from 1,380 rpm.
The new BMW 340i Sedan equipped with the 8-speed Steptronic transmission accelerates from 0-60 mph in just 4.8 seconds while the BMW 340i xDrive model takes just 4.6 seconds. All 340i models are governed to a top speed of 155 mph.

http://www.bmwblog.com/2015/05/0 ... 30i-sedan-facelift/

The 2.0 liter B48 unit in the 330i will develop 252 hp and 258 lb-ft of torque, allowing it to get 6.5-5.5 liters per 100km (36 mpg US).
The 330i will also be able to reach 60 mph in 5.8 seconds, which is properly quick.
It also greatly reduces carbon emissions from the outgoing 2.0 four. It can send the power to the rear or all four wheels. The consumption could be reduced by more than 12 percent as the 330i comes with an eight-speed automatic and standard size 225 tires.

328应该还会有更大的折扣么

之前的press release是
MY2016开始340换b58
MY2017开始330换b48
320沿用n20到2017,之后还不知道

换代早了啊，刚LCI，换代起码MY2018之后了

model year