Compared to the latest generation M5, the G30 M550i is almost as quick off the line and can cost less than half as much on ...

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While the current turbocharged four-cylinder and six-cylinder engines are reportedly being carried over to the next generation, this is less likely for the twin-turbo 4.4-liter V8 found in M550i ...

With its bangin' V8 and plush interior, the M550i xDrive offers most of the M5 experience for tens of thousands of dollars less. Steven Ewing spent his childhood reading car magazines, making his ...