Ask any economics professor – competition is a good thing. Exhibit A? The large pickup truck market. Ford F-Series trucks have been the number-one selling vehicle line in the United States for more than three decades, but the automaker has never grown complacent. Each new iteration has been bigger, badder and more capable than its predecessor, and that goes twofold for Dearborn's heavy-duty models.

Despite the fact that Toyota and Nissan never followed up their light-duty trucks with three-quarter or one-ton models, just the threat of such entries spurred Ford, General Motors and Dodge to significantly up their games. In the first half of 2010, the Detroit Three have introduced revamped heavy-duty pickups to feed a segment that, while shrinking, remains large and highly profitable. With that in mind, we saddled up to the Big Daddy of the F-Series range, the F-450, to see if the behemoth could play the dual roles of load-lugger and daily ride. Click through the jump to see how we fared.

Taking a great looking performance car and chopping off its roof is risky business – compromises are inevitable. That's especially true in this modern age of unibody structures. Removing a big chunk of a vehicle's architecture without adequately reinforcing what's left can yield a chassis incapable of managing the position of the wheels, let alone result in a vehicle that loses its level of driver engagement and enthusiasm. On the other hand, reinforcements add mass – often lots of it. It's a treacherous path, as both flaccid body control and weight are the mortal enemy of performance.

You can understand our trepidation, then, upon learning that Audi was planning on introducing its S5 Cabriolet at the 2009 Geneva Motor Show. By our reckoning, the German debutante's rollout was cause for both consternation and celebration. When the A5 and S5 coupes arrived in 2007, they were hailed as being among the best looking cars ever to wear the brand's Four Rings. The new Cabriolet models would bring with them the euphoria of open-air motoring, but we had to wonder – would Audi's rakish new hardtop be turned into a floppy flier just by giving it a roofectomy? Equally as important, would the model's newly downsized engine drop the performance? There was only one thing to do: Put the range-topping S5 Cabriolet through a week-long test.

It's no secret that the revived 2010 Honda Insight has been a huge sales disappointment in North America. The once-robust sales of the Civic hybrid have also evaporated in the last two years. Apparently, things are far worse for Honda's hybrids in Canada where higher fuel prices typically cause people to buy more efficient vehicles.

An unconfirmed report from a Canadian web site indicates that both the Civic hybrid and the Insight are being discontinued there. Checking the Canadian sales charts, the Civic as a whole is one of the top-selling cars in Canada with 31,604 units sold in 2010 through July.

While hybrid sales are not broken out by Honda Canada, we can do a little educated guessing. Since only 643 of those Civic sales were imports and the hybrids come from Japan, we can figure that those 643 were the hybrid models. Similarly, Canadians only bought 748 Insights in the same period. When it launched, Honda projected 10,000 annual sales in Canada. Evidently Canadians just aren't taken with hybrids – even the mighty Prius has only found 2,272 Canadian buyers this year.

Honda hasn't yet responded to a request for comment on the cancellation of these two models. Apparently, Honda Canada will still proceed with the launch of the CR-Z there, maybe leaving it as the company's only hybrid. A tip of the hat to Mario!

As much as we talk about range anxiety here, the reality is the vast majority of drivers in America probably aren't even really aware of the term in the automotive context. Yet. But that's because only a tiny fraction of them have ever been in any kind of electric vehicle other than a golf cart.

When the Nissan Leaf and Chevrolet Volt hit the market this winter, though, followed by the Ford Focus and others next year, more drivers will become aware of the phenomenon. And, when dealers start selling these machines, they are going to have to change the practices ingrained by more than a century of internal combustion.

Marketers and retailers will no longer be able to just hand off the keys and send people on their way. First they will need to evaluate customers and determine if a plug-in vehicle is the choice for their needs. If so, then they have to get them used to doing what most of us now do with our cell phones: plug them in at every available opportunity. When your battery runs dry on the side of the interstate, roadside assistance will have to bring a flat-bed instead of a gallon of fuel, something drivers will want to avoid as much as possible.

With the introduction of the A5 for 2008, Audi launched itself into a vehicle segment it had never competed in – one which has waned significantly over the past two decades. Not so long ago, the personal luxury coupe was one of the top selling segments in the U.S., but for a wide variety of reasons, the overall sales picture left it behind.

Now you might ask yourself, "How is an A5 in any way similar to the likes of a 1970s-era Chevrolet Monte Carlo or Ford Thunderbird?" At first glance, the A5 is something completely different, but when you dig below the surface, there are more similarities than one might think – particularly when considering the 2.0T model. Except for a few NASCAR-inspired specials, PLCs of the 1970s weren't typically performance machines anyway – they focused more on style and creature comforts. And it's here where the A5 delivers.

Over the past two decades, Audi has been steadily climbing the ranks to become one of the preeminent automotive design houses. Concepts through the 1990s and the 2000s included the original TT and Nuvolari showed that Audi was capable of delivering more than bland German executive lunchboxes. The real explosion began when the first-generation TT entered production, and ever since, Audi's lineup has grown bolder with each successive model. The birth of the A5 brought mainstream Audi design to a whole new level, and it's fair to say that not only is this coupe is among the most attractive Audis in existence, it's probably one of the best looking coupes we've seen in decades.

If there were one undeniable business lesson to be learned from the auto industry during the past decade, it's to keep a close eye on your sales and a closer eye on your capacity. As Ferrari executives have repeatedly said over the years, the supply of any model should always be exactly one less than the demand. Less supply and you're leaving money on the table, more and you've got unused capacity.

This philosophy can be adapted to a wide array of businesses and is especially relevant to small businesses. Many small businesses need to deliver product or services to their customers. For many that operate locally, existing options like the Dodge Sprinter or Ford E-Series vans are simply too large, thirsty and unwieldy for their needs. Enter the Ford Transit Connect. Since being introduced last year in North America, an increasing number of businesses small and large have found the Transit Connect to be just the right size for their needs. We spent a week with a cargo van version to find out what it's like to live with. Follow the jump to read on.

Needless to say, the 2010 Acura ZDX is a peculiar beast. And after a week's worth of testing, we're still not sure what to make of it.

When pondering the idea of any near-$100,000 hybrid luxury sedan, one has to wonder, "What's the point?" The only hybrids that sell in any significant numbers are the Toyota Prius and Ford Fusion, and for good reason. Both allow drivers – and particularly hyper-milers – to squeeze every last kilometer out of each gallon of fuel.

Obviously, anyone with the financial wherewithal to purchase a 2010 Mercedes-Benz S400 Hybrid is unlikely to be motivated by the technology's fuel savings. Similarly, if someone wants to make a social statement by driving a "green" vehicle, they will likely want their ride to be instantly recognizable as a hybrid.

So the cost-no-object camp is divided. They can either drop their coin on an all-electric Tesla Roadster or, in spite of their bank balance, go with a lowly Toyota. Which begs the question: Is there something in between? We tested Mercedes' newest hybrid to find out.

When the redesigned Acura TL debuted in late 2008, it represented a substantial transformation over previous iterations. The third-generation model retained the transverse V6 of its two predecessors, but for the first time included an all-wheel-drive option. But while the torque-vectoring Super Handling-All Wheel Drive is an appreciated addition when you're putting out over 300 horsepower, performance oriented drivers were appropriately miffed that both the TL Type-S and a manual transmission were no longer available.

Thankfully, shortly after the 2009 TL went on sale, Acura announced plans to add a manual gearbox back to the lineup. Unfortunately, it would take an entire year before it hit the market. Now it's here, and we're ready to find out if the Acura TL SH-AWD six-speed can fill the Type-S-sized hole in our hearts.

BMW's storied history of building roadsters dates back to the original 328 of the 1930s. However, there have been gaps in the brand's open-top lineage, including one extended stretch through the '60s, '70s and '80s. After a dalliance with the bizarre European market Z1, BMW finally got serious about roadsters again in the '90s with the introduction of the Z3.

Earlier this year, the Munich brand introduced what's essentially the third generation of its modern mainline roadster (discounting the aforementioned low-volume Z1 and the Z8) in the shape of its all-new Z4. Upon its introduction, the esteemed Mr. Harley took our first crack at the new "E89" at its Southern California launch last spring and came away with mixed feelings.

To be fair, whenever an automaker builds a new model, there's always a distinction between what the engineers and designers expect of it and what consumers bank on. There's also a big difference between spending a few hours on a prescribed driving route under controlled conditions versus living with a car as a daily driver for a week or longer. So we wanted to spend time with the Z4 on more familiar turf to see what life is like with BMW's newest roadster.

It's no secret that we've been openly critical of the prices charged by automakers for built-in GPS navigation systems. Frankly, paying $2,000 or more for an in-dash system when you can buy stand-alone navigation units for as little as $100 is ridiculous. Even the newer, larger seven-inch screen units are now down to as little as $250, and even though they aren't tied in to a vehicles' wheel sensors, they tend to be plenty accurate. Now, however, there is a new option that is even cheaper – as in (sort of) free.

It's only "sort of" free because the Google maps turn-by-turn navigation app is built into the new Motorola Droid smartphone (see sister-site Engadget's full review of the Droid here) that recently became available from Verizon Wireless. In this case, you have to sign up for two years of mobile phone service, which includes a data plan. I've been a Verizon customer for a decade and just happened to be up for a biennial discounted phone upgrade. When the Droid appeared a few weeks ago, the plan to wait until the new year for a Palm Pre was discarded. We've now had the chance to play with the Droid and its new navigation software, so follow the jump to find out if it lives up to expectations.

While Ford has been introducing a countless string of Mustangs that appeal to nearly every enthusiast on the planet, Chevrolet has had to make due with only three versions of the Corvette (five if you count both coupes and convertibles). Well, for 2010, Chevrolet is adding a new model to the mix, the Corvette Grand Sport. Bridging the gap between the base Corvette and the track-focused Z06, the Grand Sport – unlike the aluminum chassis Z06 and ZR1 – is available in both coupe and convertible form, giving 'Vette lovers another way to enjoy motoring al fresco.

After spending a few hours at General Motors' Milford Proving Grounds wringing out the GS on track back in August, we finally managed to snag some significant street time in a Crystal Red Grand Sport convertible. Lo and behold, when we looked inside we found a manual transmission, meaning this particular Grand Sport is packing the new-for-2010 launch control system. So now it's time to find out if this newest 'Vette variant is as livable on the road as it is fun on the track.

Over its 61-year history, Lotus Cars has spent a considerable amount of time clawing its way back from the brink of insolvency. The company's most recent bout with financial disrepair came in the early Nineties after the front-wheel-drive Elan proved a commercial failure (surprise!) and the Esprit toiled away in the shadows of newer, more powerful supercars. As hope for the historic marque's triumphant return began to fade, a group of Lotus engineers pooled their collective will to create an all-new, back-to-basics model that would revive Colin Chapman's company and give hardened enthusiasts the purist's driving tool they craved.

In September of 1996, the Elise was born, and four years later, its hard-top sibling – the Exige – came on the scene. Over the last decade, we've seen a raft of super-special-limited-edition variants follow in its lightweight wake, but the ultimate version is this: the 2009 Lotus Exige S 260. Packing more power and "more lightness" than the 240 Sport we sampled last year, there's no doubt it's a telepathic terror on track, but we wanted to know if it was up to the depravity of Michigan roads, so we set our chiropractor on speed dial and headed out...

The 2010 Acura TSX V6 is something of a consolation prize. At the 2008 Detroit Auto Show, Acura showed off a new 2.2-liter four-cylinder diesel and said it would launch in the U.S. this year. A few months later in New York, Honda's luxury arm showed off the all-new second generation TSX sedan, and we expected to be driving the culmination of the two right around now.

Unfortunately, a confluence of events a few months after the TSX was shown caused Acura to reverse course and put the diesel engine on the shelf. As world oil prices hit all time record levels, the never ending construction in China and Dubai seemed to be consuming the entire world supply of diesel, driving prices higher and higher. At about the same time, the world came to the realization that loaning money to people who couldn't pay it back might not be a great idea after all. With sales in the toilet everywhere, Acura decided that throwing a gasoline-powered V6 into the TSX might be a better idea. Was it?