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  1. For internal combustion to take place, fuel needs oxygen, the source of which is atmospheric air. During the intake stroke (as the piston descends within the cylinder), the mass of air inducted is strictly at ambient pressure. Cylinder volume is a physical constant, but the mass of air that fills any space is a function of pressure. Hence, the higher the pressure, the greater the mass of air that can occupy any given volume, simply because air is compressible. A device that “blows” air into the cylinder would enable more air-mass to be squeezed inside said cylinder than by natural aspirat
  2. Every year, during the late autumn weeks on the fringe of Oktoberfest, Audi and BMW hold technology workshops to introduce their latest engineering developments. Some of the most important are in the science of internal combustion, which has enjoyed renewed interest and continued investment from car companies in recent years – due to the emergence of electric vehicles (EVs), ironically. Over the last five years, it has become clear to carmakers and consumers alike that the slow progress in battery technology still plagues EVs, which therefore suffer a multitude of practical limitations. Th
  3. Renault has unveiled their new 1.6-litre F1 engine at the 2013 Paris Air Show. The direct-injected V6 unit is equipped with an exhaust-driven turbocharger, two motor generator units (MGUs) with an Energy Recovery System (ERS). For reader's information, come 2014, the current 2.4-litre V8 engines which rev to a maximum of 18,000rpm will be replaced by 1.6-litre V6 turbocharged power units revving to a maximum of 15,000rpm. The MGUs are capable of producing 160bhp while the turbocharged 1.6-litre V6 churns out approximately 600bhp, bringing the combined output to roughly 760bhp. A
  4. http://www.youtube.com/watch?v=Jm90__azVSo Mercedes has revealed the 2014 S 63 AMG ahead of its public debut in September's Frankfurt Motor Show. The high performance Mercedes flagship sedan is powered by a direct-injected, twin-turbocharged 5.5-litres V8 engine which delivers 585 bhp and 900Nm of torque. The engine is mated to a seven-speed AMG SPEEDSHIFT MCT sports transmission with three selections, namely "C" (Controlled Efficiency), "S" (Sport) and "M" (Manual). Both the SWB and LWB S 63 AMG take only 4.4 seconds to reach 100km/h from standstill. The AWD 4MATIC
  5. Both cars are built on the same platform. Both are powered by the most powerful series-production four-cylinder turbo engine in the world. Not only that, both are equipped with the AMG SPEEDSHIFT DCT seven-speed sports transmission and performance-oriented AMG 4MATIC all-wheel drive. These two cars could not be more similar. We are taking about the Mercedes A 45 AMG and CLA 45 AMG. Auto Express has put up a comparison test involving the two AMG vehicles. These cars are the first four-cylinder models from the tuning company. So, which model will emerge victorious ? The CLA 45 AMG
  6. The BMW 3 Series has gone the force-fed way, leaving the Lexus IS perhaps as the only model in the premium compact segment that still uses naturally-aspirated propulsion. As the saying goes, it is better to be late than never. Toyota is said to offer its first turbocharged 2.0-litre, four-cylinder engine in Lexus vehicles beginning late 2014 or early 2015. The new engine will debut in a new compact crossover called the NX 200t. The engine could possibly replace the 2.5-litre V6 as the entry level engine in the Lexus IS sedan lineup. It could also appear in other products such as the
  7. The radical Jaguar C-X75 unfortunately did not make it to production due to the ongoing global economic crisis. However, a few working prototypes were built. Up to three of these will be auctioned off, while one will go into a future Jaguar museum and the other will be kept by Jaguar for running demonstrations. Autocar U.K. was fortunate enough to get behind the wheel of one of these and did a review of the supercar that suffered from stillborn. The review was very positive and the reviewer commented that it is a shame that nobody will really get a chance to own one. The hyb
  8. Autocar UK has taken the hot new CLA 45 AMG for a spin a few days after reviewing its cousin, the A 45 AMG. Both cars share the same all-wheel drive platform, engine and transmission. The CLA 45 AMG measures 4,630mm long, which is a significant 338mm longer than the A 45 AMG. It also carries an extra 30kg of mass as compared to the hatchback. Despite all these, Mercedes claims that the CLA 45 AMG shares the same century sprint timing and top speed as the A 45 AMG. On paper, the four-door coupe seemed as fun to drive as the A 45 AMG. So, let's hear what reviewer Steve Sutcliffe has
  9. For BMW fans, the highly anticipated BMW 4 Series Coupe has been revealed. The 4 Series is the successor to the current 3 Series Coupe. In the U.S.A, the 4 Series is available with two variants, namely the 428i and the 435i. Both models have an all wheel drive setup. The 420d will be available only in Europe at the moment. The 428i is powered by a 2.0-litre turbocharged inline-four that churns out 245bhp. With an eight-speed automatic transmission, it takes 5.8 seconds to go from 0 to 100km/h before hitting an electronically-limited top speed of 250km/h. The higher-spec 435i comes
  10. Believe it or not, this is the refreshed 2014 MY Alfa Romeo MiTo. The little Italian hatchback is said to have an updated grille and headlights. However, I can't seem to spot any difference with the current model. Well, perhaps it is time for me to go for an eye checkup. What is more obvious is that the Impression variants get a new set of 15-inch alloys. There is also a new colour, Anthracite Grey, added to the range, bringing the exterior colour choices to ten. Interestingly, the 0.9-litre Turbo TwinAir engine has found its way under the hood of the facelifted MiTO. The sub on
  11. Recently, Auto Express setup a quarter mile drag race between two AMG models. They are the CLS 63 AMG Shooting Brake and the 'entry level' AMG, the A 45 AMG. The competition feels like David vs Goliath as the CLS 63 AMG has a twin-turbo 5.5-litre V8 engine that generates 518bhp while the 45 AMG makes do with a turbocharged 2.0-litre that makes 355bhp. In terms of engine capacity, the CLS63 is more than two times that of the A45. Is the A45 destined to lose the drag race to its much more powerful sibling? Or will the lighter AWD hot hatch with dual-clutch transmission reign supreme? I
  12. Opel has removed the wraps off the 2013 Insignia facelift. The revised German mid-sized sedan will be making its world premiere at the Frankfurt Motor Show in September. Exterior updates include revised headlamps, front and rear bumpers, taillight combination and front grille. On the inside, the center console is now less cluttered with buttons, which Opel claims improved intuitive operation of common functions such as air conditioning and infotainment. The instrument cluster also has a new set of dials. A new flat-bottomed steering wheel completes the interior update. F
  13. Brawn and brains will finally meet at the Goodwood Festival of Speed when Peugeot reveals the production version of the RCZ R coupe. The event will be held in England from 11th to 14th July. The RCZ R is previewed by the RCZ R concept (above) which debuted at the 2012 Paris Motor Show. Powered by a 260bhp 1.6-litre THP engine, the RCZ R takes the honour of being the most powerful production model in the French brand's history. This puts the car among the most powerful production cars based on a power-per-litre basis, surpassing even the Bugatti Veyron Super Sport. Despite of its raw power
  14. Ford launched the 2014 Mondeo (Fusion) at the Shanghai Motor Show in April with a brand new 1.5-litre EcoBoost engine. The 1.5-litre engine benefits from the signature EcoBoost turbocharging, direct fuel injection and variable valve timing. Now, Ford has officially announced the output of the new power plant. It produces 178bhp with an accompanying 240Nm of torque available between 1500rpm to 4500rpm. Fuel consumption figures are not available at the moment. Power is similar to the existing 1.6-litre EcoBoost but torque figure is 9Nm lower. The 1.6-litre EcoBoost in the six
  15. Ford's 1.0-litre EcoBoost engine has won the "International Engine of the Year" award for the second consecutive year. Not only that, the turbocharged, direct-injection three-cylinder engine achieved the highest score in the 15 year history of the awards. "With a technology as mature as the internal combustion engine, it's very rare to achieve a true breakthrough, but that is exactly what the team accomplished with this engine," said Joe Bakaj, Ford Vice President, Global Powertrain. "You have to drive it to believe a small three-cylinder engine can deliver such performance and fuel econom
  16. Skoda has officially unveiled the top-of-the-range vRS version of the all new Octavia, which is planned for a public debut on 10th July at the Goodwood Festival of Speed held in England. The 2013 Octavia vRS will be available in both sedan and combi body styles. Engine options include the 220bhp 2.0-litre TSI gasoline engine and the 184bhp 2.0-litre TDI. Skoda offers a six-speed DSG transmission as an option for both engines. For the standard six-speed manual version, the petrol vRS does the century sprint in 6.8 seconds while the TDI needs 8.1 seconds. The 2013 Skoda Oct
  17. Edmunds.com, an American online resource for automotive information, pitted the fresh-from-the oven 2013 Lexus IS250 against the Cadillac ATS 2.0 and the compact luxury segment leader, the BMW 328i. The IS250 is powered by a naturally-aspirated 2.5-litre V6 which is good for 204bhp. The 328i and ATS are both propelled by their respective 2.0-litre direct-injected, turbocharged four cylinder which produces 240bhp and 272bhp respectively. This is the third generation of the Lexus IS. However, will it be third time lucky against the BMW 3 Series?
  18. Like the ninth generation Honda Civic, the Chevrolet Malibu mid-sized sedan has received a facelift barely a year after its launch during the second half of 2012. This would generally indicate that the new model is not well received by the public. "The 2014 Chevrolet Malibu builds on the strengths established by the all new 2013 Malibu to make it a stronger choice for customers," said Mark Reuss, President, General Motors North America. "The midsize sedan segment is the most contested in the industry and we
  19. Recently, I blogged on two reviews involving the Ford Fiesta ST and Peugeot 208 GTI. Now, Auto Express U.K. made a triple-threat match by pitting the Fiesta ST and 208 GTI against Renault Clio RS. In the previous reviews, the Fiesta ST was clearly preferred over its French rival. Can the American pocket rocket do it again? Like the other two members in this group test, the Clio RS is powered by a 1.6-litre turbocharged engine which is good for 200bhp and 240Nm of torque. However, it is the only car here with a twin-clutch six-speed automatic transmission. The Clio RS also takes the po
  20. [extract] Three Ford vehicle owners in the US have filed lawsuits against the company for alleged defects in the automaker
  21. For those who intend to buy an Opel Astra 1.6 Turbo, you may want to hold off your purchase for a while. This is because the brand's latest 1.6-litre SIDI turbo petrol engine is now available on the five-door hatchback, four-door sedan and Sports Tourer versions of the Astra. The new engine will replace the existing 1.6-litre Ecotec turbocharged unit. The new range topper makes 168bhp and 280Nm of torque, which is 10bhp less but 50Nm more than its predecessor. In addition, torque availability has dropped from 2,200rpm to just 1,650rpm. The engine is available with either a n
  22. MG is developing a range of turbocharged, direct-injected gasoline engines which will be launched in China at the end of 2014, and arriving in Europe a year later. These engines include 1.4-litre and 1.5-litre force-fed units as well as a 1.0-litre three-cylinder unit that claims to rival Ford's Ecoboost unit. Given that Ford's 1.0-litre EcoBoost engine has been named the 2012 'International Engine of the Year' - MG has got some very serious work to do. "Our benchmark for the 1.0-litre has to be the Ford Ecoboost engine," commented MG's Head of Powertrain, Paul McNamara. "Ford h
  23. After much anticipation, the all new Audi A3 sedan has made its world premiere at the 2013 Shanghai Motor Show. The A3 sedan replaces the A4 as the new entry level sedan for the German brand. The A3 sedan is designed to ward off competition from the Mercedes-Benz CLA-Class and the upcoming BMW 1 Series sedan. The styling is very typical of Audi and one would not mistake it for any other makes. The baby Audi sedan measures 4,460mm long and 1,800mm wide with a wheelbase of 2,640mm. This makes the car shorter but wider than class competitor, the CLA. Base engine is a 1.4-lit
  24. You may have seen the studio photos of the all new Maserati Ghibli. In this blog entry, you will see some images of the BMW 5 Series basher, which were taken during its launch at the 2013 Shanghai Motor Show. Personally, I prefer such photos as they are not taken in a controlled environment and hence a better representation of the final product. To recap, the new Ghibli will be available with the choice of two 3.0-litre turbocharged petrol engines that produces 330bhp or 410bhp. The lower powered version is good for a century sprint timing of 5.6 seconds while the higher powered mo
  25. Ford has announced that it will introduce a new 1.5-litre four-cylinder EcoBoost engine for the China-bound Mondeo, which will debut at the upcoming Shanghai Motor Show. The engine will also propel the Fusion (a rebadged Mondeo) in North America and subsequently the Europe market Mondeo. The announcement may come as a surprise as it is contrary to earlier reports which expect the 2013 Mondeo to be equipped with Ford
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