By on September 15, 2015

Mercedes-Benz "Concept IAA"

While it may or may not be the next-generation Mercedes-Benz CLS-class (note: probably not), the automaker took the wraps off a transforming concept car that grows in length significantly at highway speeds to better cut through air.

The Mercedes-Benz IAA concept (Intelligent Aerodynamic Automobile) was shown off Tuesday in Frankfurt and, according to the automaker, can grow by 390 millimeters to achieve a drag coefficient world record of 0.19. (The current generation Prius is around 0.25, for reference.)

The whole thing is powered by a hybrid powertrain that’ll never see the light of day and sports an interior array of electronics that’s probably something out of “Minority Report.” It’s the moveable aerodynamic elements on the IAA that could see production, and there are a lot of them.

(Read More…)

By on July 27, 2015

nissan gtr lm

When was the last time you saw a pretty race car? Maybe I’m turning into Walt Kowalski, but it seems to me that the racing machines of my youth looked nicer. Is there a purer shape than Jim Clark’s Indy 500 winning Lotus 38? Is not the Lola T70 sensuous? Some of Jim Hall’s Chaparrals, like the 2H “vacuum” car and the 2J streamliner with its center mounted high wing look a little odd, but even the 2J has an aesthetically pleasing shape, something you can’t say about a modern Formula One racer, with it’s dizzying array of airfoils, winglets and canards. (Read More…)

By on June 10, 2015

06 - 2013 Scion FR-S - Picture courtesy of Phil 'Murilee Martin' Greden

Regulation. It dictates the majority of modern car design. Whether it be for pedestrian safety, crash worthiness, economies of scale, or fuel efficiency, the basic building blocks of modern cars are decided well before pencil is met with freshly-bleached paper (or, these days, before stylus meets tablet).

That last item – fuel efficiency – is as much a matter of aerodynamics as it is what’s under the hood, and aerodynamic efficiency isn’t just about fenders and trunk lids.

Which brings me to wheels – specifically, OEM wheels – and how absolutely ugly they’ve gotten the last few years.

(Read More…)

By on May 28, 2015


Bob writes:

Hi Sajeev. I’m annoyed by styling that makes the trim height look wrong. Most cars today look like the front is sagging or the rear is too high. The stylists even slant side creases and trim strips down toward the front (Man, I hate that. – SM) to create this look even though a close look at the rocker panel shows that the car is level.

Why are they doing it? Does the public really like it?

Sajeev answers:

The delicate balance of physical + visual trim height adjustment is standard practice, proving itself over decades for both aerodynamic and stylistic enhancement. The problem? Jumping the shark. (Read More…)

By on January 16, 2015




“Wait! Is that a…”

“Are you British?”

 “I haven’t seen one of these since I left Venezuela as a teenager, only rich people had Sierras!”

Behold random responses from gawkers of TTAC’s Project Car. The surprises continue after several hundred miles under the Ford Sierra’s belt, as life with this fish out of water is far from a compromise. (Read More…)

By on September 22, 2014

CL 14.129.002

In the 1930s, Chrysler experimented with aerodynamics to deliver a product that could slip through the wind better than the vehicles of the day, bestowing upon the public the Airflow. Alas, not too many people were ready for the future, leaving the concept a commercial failure.

Today, Citroën is giving the name and concept a second try, with fuel economy and the environment in mind.

(Read More…)

By on March 1, 2014

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Click on the settings icon in the menu bar of the video above to watch it in 2D or your choice of 3D formats.

The second best part about the job of writing about cars is not getting to drive expensive cars for free or being flown to resorts with Jacuzzi tubs. No, the second best part about the gig is that I get to see and do some very cool car guy things. How many of you have watched film or video of a car being tested in a wind tunnel and thought to yourself, “that’s neat!”? Well, this week I got to observe the new 2015 Ford Mustang’s aerodynamic features demonstrated in one of those neat wind tunnels. (Read More…)

By on December 12, 2013


Gordon Buehrig’s design of the Cord 810/812 was revolutionary for its day. One innovation was that it lacked running boards, something automobiles had featured almost since the dawn of the motoring age. I’m guessing that the origin of running boards has to do with the fact that in the early days car bodies were typically mounted right on top exposed frame rails, putting the body up high, and the running boards were used as step to get up into the interior. From a design standpoint, they also visually connected the front and rear fenders, creating one flowing line. What was stylish in 1913, though, wasn’t necessarily au courant in the mid 1930s. Also automotive design started getting more formally established in the 1930s, with GM and Ford both having in-house design staffs by the end of that decade. Based on the then young science of aerodynamics and the related streamlined aesthetic, new shapes started appearing on cars. (Read More…)

By on August 7, 2013


Never forget: people make all the difference.  This often overlooked fact in the glamorous world of automotive styling rings true for the life of Mr. Uwe Bahnsen. I froze in my tracks when I heard of his passing on Car Design News. His work at Ford and with the Industrial Design community influenced me, and every American who loved cars in the 1980s.

How ironic that Mr. Bahnsen’s passing was the week TTAC’s own Ford Sierra passed its citizenship test in Texas: so here’s a great Germanic-Texas Beer for you, Mr. Bahnsen. (Read More…)

By on February 8, 2012



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TTAC commentator educatordan writes:

I know this is an exercise in mental masturbation but I find myself thinking about it and perhaps the B&B with their extensive experience could shed some light on the subject. (Read More…)

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