But while boxer 4s (or even the V-4 engines used in many motorcycles) offer advantages in smoothness, automakers say that their modern in-line 4s are smooth enough to satisfy even the fussiest customers.
These days, to be an R & B singer is to be an anomaly, too smoothed-out to match wits with Snoop Dogg and not quite smooth enough to outshine 'N Sync.
Hamlisch worked out a set of moves smooth enough to make Yankee shortstop Derek Jeter proud.
The imperial hand-off proved smooth enough to preserve disproportionate British influence in the world through a restive American cousin.
Though it was almost smooth enough to be a slow jam, its lyrics more closely resembled a hip-hop freestyle.
The TV integration is almost smooth enough to make me plug it into the heart of my living-room setup.
The harness, with five adjustment points, and the supportive head rest, will keep baby secure and the bounce is smooth enough to calm the most active little ones.
The Canadian archipelago, where Franklin foundered, will still be full of intersecting straits and fickle ice conditions, likely not smooth enough to compete directly with more temperate routes.
Styled in the iPod mould, it's a little weighty, but the sound is crisp and it looks smooth enough to satisfy any design junkie.
Corning's two-year-old LEAF, for Large Effective Area Fiber, is big and smooth enough to carry large volumes of light for long distances before they require amplification.
"The only option remaining in the metropolitan area that was long enough, wide enough and smooth enough to land was the Hudson River," he said.
