Comparison: Cadillac CTS-V and Porsche Panamera S

Porsche has recently fielded their first 4-door sedan, the Panamera.  The new Porsche Panamera is sort of a low-flying variant of the Porsche SUV, the Cayenne.  It uses similar nomenclature, and powertrains as the SUV.  The Panamera has widely been panned for its visual appeal (or lack thereof), but I am a function over form person.  I am also a Porsche fan from way back, so let’s see how the new German compares with Cadillac’s CTS-V Supercar Sedan.

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Cadillac CTS-V's at Montecello Motor Club

The Porsche Panamera comes in S, 4S, and Turbo Variants.  The Panamera S, which starts at $90.7K, is the Panamera model that is likely to be cross-shopped with the $60.7K Cadillac CTS-V.

Porsche Panamera S

Porsche Panamera S

Here are the stats according to Motor Trend for the Porsche Panamera S:

2010 Porsche Panamera S
Base price range $90,775
Price as tested $104,805
Vehicle layout Front-engine, RWD, 4-pass, 4-door hatchback
Engine 4.8L/400-hp/369-lb-ft DOHC 32-valve V-8
Transmission 7-speed twin-clutch auto
Curb weight (dist f/r) 4108 lb (53/49)
Wheelbase 115.0 in
Length x width x height 195.6 x 76.0 x 55.8 in
0-60 mph 5.1 sec
Quarter mile 13.5 sec @ 105.8 mph
Braking, 60-0 mph 108 ft
Lateral acceleration 0.95 g (avg)
MT figure eight 25.7 sec @ 0.72 g (avg)
EPA city/hwy fuel econ 16/24 mpg
MT observed fuel econ 16.8 mpg
CO2 emissions 1.03 lb/mile
It would be ideal to compare these cars head to head.  Lacking that, here’s some similar Motor Trend test data for the Cadillac CTS-V:

Motor Trend Data: 2009 Cadillac CTS-V

2009 Cadillac CTS-V
POWERTRAIN/CHASSIS
Drivetrain layout Front engine, RWD
Engine type Supercharged 90-deg V-8, alum block and heads
Valvetrain OHV, 2 valves/cyl
Displacement 376.1 cu in/6162 cc
Compression ratio 9.0:1
Power (SAE NET) 556 hp @ 6100 rpm*
Torque (SAE NET) 551 lb-ft @ 3800 rpm*
Redline 6200 rpm
Weight to power 7.7 lb/hp
Transmission 6-speed automatic
Axle/final-drive ratios 3.23:1/2.16:1
Suspension, front; rear Control arms, coil springs, adj shocks, anti-roll bar; multi-link, coil springs, adj shocks, anti-roll bar
Steering ratio 16.1:1
Turns lock-to-lock 2.6
Brakes, f;r 14.6-in vented disc; 14.4-in vented disc, ABS
Wheels, f;r 9.0 x 19-in; 9.5 x 19-in, forged aluminum
Tires, f;r 255/40R19 96Y; 285/35R19 99Y Michelin Pilot Sport PS2
DIMENSIONS
Wheelbase 113.4 in
Track, f/r 61.8/62.0 in
Length x width x height 191.6 x 72.5 x 58.0 in
Turning circle 37.9 ft
Curb weight 4277 lb
Weight dist., f/r 54/46%
Seating capacity 5
Headroom, f/r 38.8/37.2 in
Legroom, f/r 42.4/35.9 in
Shoulder room, f/r 56.7/57.4 in
Cargo volume 13.6 cu ft
TEST DATA
Acceleration to mph
0-30 1.8 sec
0-40 2.6
0-50 3.3
0-60 4.3
0-70 5.5
0-80 6.8
0-90 8.1
0-100 9.7
Passing, 45-65 mph 2
Quarter mile 12.6 @ 114.6 mph
Braking, 60-0 mph 106 ft
MT figure eight 25.1 sec @ 0.75 g (avg)
Lateral acceleration 0.94 g
Top-gear revs @ 60 mph 1800 rpm
CONSUMER INFO
Base price $60,700
Price as tested $66,835
Stability/traction control Yes/yes
Airbags Dual front, front side, front/rear curtain
Basic warranty 4 yrs/50,000 miles
Powertrain warranty 5 yrs/100,000 miles
Roadside assistance 5 yrs/100,000 miles
Fuel capacity 18.0 gal
EPA city/hwy econ 14/19 mpg
CO2 emissions 1.22 lb/mi
Recommended fuel Unleaded premium

Read more: Motor Trend Test

Conclusions?

  • The more expensive, Porsche Panamera Turbo, at 500 hp, comes closer to CTS-V performance than the Panamera S  model, but is unlikely to be directly shopped with a CTS-V since it costs roughly twice as much as the Cadillac.
  • The CTS-V has more power, at 556 hp/551 lb-ft vs 400-hp/369 lb-ft for the Porsche Panamera S, but weighs slighly more at 4,300 lbs vs 4,137 lbs.
  • The CTS-V acceleration numbers are notably stronger, with an advantage of 0.8 sec 0-60, at 4.3 sec for the Cadillac vs 5.1 sec for the Porsche.  At the quartermile the difference is still 0.9 sec, placing these two cars in different classes for acceleration.  Cadillac CTS-V: 12.6 @ 114.6 mph Porsche Panamera S: 13.5 sec @ 105.8 mph
  • Cornering:  The Porsche has the advantage here, pulling 0.94 g’s on the skidpad vs 0.93 g’s for the Cadillac.  However, the CTS-V powers ahead in the Figure-8: 25.1 sec @ 0.75 g (avg) for the Cadillac vs 25.7 sec @ 0.72 g (avg) for the Porsche.
  • The Porsche has the advantage in fuel economy, at 16/24 mpg city/highway vs a thirsty 14/19 mpg city/highway for the Cadillac.
  • The CTS-V is almost $30K less expensive than the Porsche, with the Cadillac CTS-V at $60.7K, and the Porsche Panamera S at $90.7K (starting prices).

Cadillac Northstar Headgasket Repair

Cadillac Northstar Engine LD8

Cadillac Northstar Engine LD8

The Cadillac Northstar DOHC V8 engine is a terrific powerplant and has been in continuous production now for 17 years.  As with any mechanical system, eventually it will need maintenance or repair.   If the headgasket blows, or the head bolts pull, then the powertrain has to be removed from the vehicle, and the heads removed so that the gasket can be replaced.    The ‘shop manual’ repair for pulled threads in the block is to use TimeSerts to repair the holes.  A Timesert is a special type of threaded insert, and they have a manufacturer’s kit specifically for GM engines. I recommend anytime the heads come off a Northstar engine you go ahead and Timesert every bolt hole.  Northstar Performance of Langton, Ontario, Canada has developed a new repair system for the Northstar engine.

The Northstar Performance process?

  • The engine is removed from your car, thoroughly cleaned and inspected.
  • The cylinder block is machined to accept new custom cylinder head studs, designed by renowned Northstar enthusiast/technician Jake Wiebe, and exclusive to our shop.
  • Your engine is re-assembled with all new Fel-Pro seals and then re-installed.
  • Your engine is finally re-installed in your car with fresh oil, filter, and coolant.

What are these engine studs?

One piece CNC machined and heat treated studs completely eliminate the need for any type of threaded insert- the repair is the stud itself. There is a full 2 inches of thread gripping in the block- the most of any Northstar repair kit- and best of all it’s a one piece repair.

This message thread on the Caddyinfo.com forum is a user review / report of the process: http://caddyinfo.ipbhost.com/index.php?showtopic=23288

If you can’t get your Cadillac to their shop in Ontario, Northstar Performance has a growing list of member shops throughout the USA and Canada who can install the Northstar Performance system for your Northstar engine.  Their webtool was not responding properly as I was writing this, but email or call them for a shop near you.

Northstar Performance also offers complete Northstar engines:

We offer the best remanufactured Northstar engines that money can buy. Our rebuilt Northstar engines are hand assembled to GM factory specifications, with a few improvements that would normally not be possible with mass production. Of course, all of the engines we sell are studded using our SureGrip studs so you’ll never have to worry about pulled head bolts again. Our 6 stage remanufacturing line involves disassembly and inspection, cleaning, machining, final clean, assembly, and testing. As of December 1st 2009, all engines will be run on a test stand at various RPMs before we ship, in addition to our normal compression and oil pressure testing phase.

How can I be sure I have a blown head gasket or pulled head bolts?

I know, don’t ask a barber to tell you if you need a haircut, but Northstar Performance also has a good diagnostic list to tell if you  have a blown headgasket.

What about cost?

  • A new engine installed by a Cadillac dealer can cost as much as US$10,000
  • The TimeSert kit costs US$450, plus you then need to remove, apply the Timeserts, replace the gasket, and apply to your engine.
  • A do-it-yourself kit from Northstar Performance costs US$550 with ground shipping, or US$649 with overnight shipping.  Plus you then need to remove your engine, apply the studs, replace the gasket with the one included in the NSP kit, and apply to your engine.
  • For CDN$2,200 Northstar Performance offers a drive-in, drive-out package.   For a single fee they will remove your Northstar, repair it, and replace it in your vehicle.

Contact information for Northstar Performance:

Northstar Performance graphic

Website: http://www.northstarperformance.com/main.php

Phone: 519-875-2970
Email: info@northstarperformance.com

Mailing & Physical Address:

Northstar Performance
2491 West Quarterline Road
RR4 Langton, Ontario N0E 1G0
Canada

Northstar Performance also has a subforum on Caddyinfo.com.

Caddyinfo Cadillac Keychains

Jeff Foster of Wholesalekeychain.com ( keychains ) sent me over two sample Cadillac-related keychains to use as site give-aways.  They are each metal, with a tab and ring, and have an attractive Cadillac logo on one face and are engraved ‘Caddyinfo.com’ on the opposite face.

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The left keychain is a Cadillac TearDrop Keychain and has a more complex, articulated axis that allows more degrees of freedom for movement of the keychain tab.  This design gives a greater impression of sophistication.  The right sample is a Cadillac Black Teardrop Keychain, and  has a simple loop through which the key chain ring passes. The summary shopping page for all of their Cadillac keychains is Cadillac keychains.  Of these two the Cadillac Teardrop keychain is my favorite.

Here is the reverse side of one of the keychains, which say “Caddyinfo.com”:

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Each keychain has a good weight to it.  I am very happy with the quality of the product, and feel these will make nice prizes:  I plan to use the keychains as give-aways for an upcoming Caddyinfo.com forum contest.

wholesalekeychain.com is having a contest as well.  If you purchase a key chain from them and specify promo code: caddyinfo you get a 10% discount on your order, and  the website who refers the most purchasers will receive a prize.

I would like to say thanks to wholesalekeychain.com for sponsoring the prizes for our next forum contest!